Comtech EF Data CDM-625A Installation And Operation Manual
  1. Manuals
  2. Brands
  3. Comtech EF Data Manuals
  4. Modem
  5. CDM-625A
  6. Installation and operation manual

Comtech EF Data CDM-625A Installation And Operation Manual

Advanced satellite modem (18 kbps – 25 mbps)
Hide thumbs Also See for CDM-625A:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
Table of Contents

Advertisement

Quick Links

Download this manual See also: Operation & Installation Manual
CDM-625A
Advanced Satellite Modem (18 kbps – 25 Mbps)

Installation and Operation Manual

For Firmware Version 1.1.1 or higher
IMPORTANT NOTE: The information contained in this document supersedes all previously published
information regarding this product. Product specifications are subject to change without prior notice.
Part Number MN-CDM625A Revision 0

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CDM-625A and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Comtech EF Data CDM-625A

Summary of Contents for Comtech EF Data CDM-625A

  • Page 1: Installation And Operation Manual

    CDM-625A Advanced Satellite Modem (18 kbps – 25 Mbps) Installation and Operation Manual For Firmware Version 1.1.1 or higher IMPORTANT NOTE: The information contained in this document supersedes all previously published information regarding this product. Product specifications are subject to change without prior notice.
  • Page 3 Installation and Operation Manual For Firmware Version 1.1.1 or higher Part Number MN-CDM625A Revision 0 Copyright © 2013 Comtech EF Data. All rights reserved. Printed in the USA. Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161...
  • Page 4 BLANK PAGE...

  • Page 5: Table Of Contents

    European Union RoHS Directive (2002/95/EC) ....................xxxi European Union Telecommunications Terminal Equipment Directive (91/263/EEC) ........xxxi CE Mark ................................xxxi Product Support ..........................xxxii Comtech EF Data Headquarters .....................xxxii Warranty Policy ........................... xxxiii Limitations of Warranty ............................xxxiii Exclusive Remedies ..............................xxxiv CHAPTER 1.
  • Page 6 Selecting the Internal IF Loop ....................2–5 Connecting the External Cables ................... 2–5 REAR PANEL CONNECTORS AND PINOUTS ..........3–1 CHAPTER 3. CDM-625A Rear Panel Overview ..................3–1 CDM-625A Cable Connections ..................... 3–2 3.2.1 IF Connection Group ..........................3–3 3.2.1.1 Rx IF Connectors ...........................
  • Page 7 AC Operation – Replacing Fuses ....................... 3–17 3.3.3 Optional 48V Direct Current (DC) Power Interface ................3–18 3.3.3.1 Optional DC Operation – CDM-625A Accessories ................3–19 3.3.3.2 Optional DC Operation – Applying Power ..................3–19 3.3.3.3 Optional DC Operation – Replacing Fuses ..................3–20 CHAPTER 4.
  • Page 8 MN-CDM625A FAST Activation Procedure ....................5–2 5.2.1 FAST Activation via the CDM-625A Front Panel ..................5–2 5.2.2 FAST Activation via the CDM-625A Web Server (HTTP) Interface ............5–4 CHAPTER 6. FRONT PANEL OPERATION ................ 6–1 Introduction ........................6–1 6.1.1 LED Indicators ............................6–2 6.1.2...
  • Page 9 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A 6.2.1.6.4 CONFIG: Quad D&I (QDI) ..................6–36 6.2.1.7 CONFIG: ACM (Adaptive Coding and Modulation) (IP-ACM Mode Only) ........6–38 6.2.1.7.1 CONFIG: ACM  Min/Max-ModCod ................ 6–38 6.2.1.7.2 CONFIG: ACM  Unlock-Action ................6–38 6.2.1.7.3 CONFIG: ACM ...
  • Page 10 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A 6.2.2.2.1 SELECT: TEST  BERT  Config ................6–71 6.2.2.2.2 SELECT: TEST  BERT  Monitor ................6–71 6.2.2.3 SELECT: TEST  CnC-APC-Monitor ....................6–71 6.2.2.4 SELECT: TEST  Uncorrected-BER ....................6–72 6.2.3...
  • Page 11 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A 6.2.8.1.1 FAST: Options  View Options ................6–89 6.2.8.1.2 FAST: Options  Set Register1 or Set Register 2 ............. 6–90 6.2.8.2 FAST: Demo-Mode ..........................6–91 6.2.8.3 FAST: CnC ............................6–92 CHAPTER 7.
  • Page 12 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A 7.5.4.3.2.1 Configuration | LAN | IP ..................7–24 7.5.4.3.2.2 Configuration | LAN | ARP ................. 7–28 7.5.4.3.3 Configuration | Routing Pages .................. 7–30 7.5.4.3.3.1 Configuration | Routing | Routes ..............7–30 7.5.4.3.3.2 Configuration | Routing | IGMP ................
  • Page 13 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A EIA-485 ..........................8–1 EIA-232 ..........................8–2 Basic Protocol ........................8–2 8.4.1 Packet Structure ............................8–3 8.4.1.1 Start of Packet ............................8–4 8.4.1.2 Target Address ............................8–4 8.4.1.3 Address Delimiter ..........................8–4 8.4.1.4...
  • Page 14 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A 9.3.2.7 Home > Administration > Restore Factory Defaults ..............9–21 9.3.3 Home > Modem Submenu ........................9–22 9.3.3.1 Home > Modem > Interface ......................9–23 9.3.3.2 Home > Modem > Modem TX ......................9–24 9.3.3.3...
  • Page 15 9.3.10.9 Home > Statistics > CPU ........................9–90 9.3.10.10 Home > Statistics > Clear All Counters ..................... 9–90 9.3.11 Home > Contact Page ..........................9–90 CHAPTER 10. CDM-625A ODU (TRANSCEIVER, BUC, LNB) OPERATION ....10–1 10.1 Introduction ........................10–1 10.2 ODU Remote Control Address Setup ..................
  • Page 16 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A 10.3.3.3.3 ODU: FSK-control ....................10–13 10.3.3.3.3.1 ODU: FSK-control  CSAT ................10–15 10.3.3.3.3.1.1 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Configuration ..10–15 10.3.3.3.3.1.1.1 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Configuration  Tx ..
  • Page 17 10.4.2.4.4.1 ODU | Utilities (CSAT-5060) ................10–51 10.4.2.4.4.2 ODU | Utilities (KST-2000A/B) ............... 10–53 10.5 ODU Operations via the CDM-625A Telnet Command Line Interface (CLI) ......10–54 10.5.1 ODU Operations using the Telnet CLI ....................10–55 10.5.1.1 Home (Main) Menu ........................10–55 10.5.1.2 Home >...
  • Page 18 Configuring the CDM-625A for Carrier ID Operation ............D–3 D.4.1 Enabling Carrier ID Operation ......................... D–4 D.4.1.1 Enabling Operation via the CDM-625A Front Panel and VFD ............D–4 D.4.1.2 Enabling Operation via the CDM-625A Web Server (HTTP) Interface .......... D–4 D.4.2...
  • Page 19 Table of Contents MN-CDM625A D.4.2.1 Creating the Message via the CDM-625A Front Panel and VFD ............ D–5 D.4.2.2 Creating the Message via the CDM-625A Web Server (HTTP) Interface ........D–6 APPENDIX E. CLOCK MODES AND DROP AND INSERT (D&I) ........E–1 Introduction ........................
  • Page 20 Estimating PSD Ratio from Satmaster ....................F–19 Carrier-in-Carrier Automatic Power Control (CnC-APC) ............F–20 F.6.1 Introduction ............................. F–20 F.6.2 AUPC and Carrier-in-Carrier in the CDM-625A ..................F–20 F.6.3 The CnC Automatic Power Control Algorithm ..................F–20 F.6.4 CnC-APC Framing ............................ F–23 F.6.5...
  • Page 21 Available Baud Rates......................J–2 Configuration ........................J–2 Effect on Eb/No Performance ....................J–2 APPENDIX K. ETHERNET NETWORK CONFIGURATION ..........K–1 Introduction ........................K–1 CDM-625A Ethernet Overview ..................... K–1 K.2.1 Interface Architecture ..........................K–1 K.2.2 Modes of Ethernet Operation ......................... K–2 K.2.3...
  • Page 22 L.2.5.2 Advanced Encryption Standard (AES) Encryption ................L–4 L.2.5.3 Header Compression ........................... L–4 L.2.5.4 Payload Compression .......................... L–5 CDM-625A Operation with IP Packet Processor ..............L–5 L.3.1 Front Panel Operation ..........................L–5 L.3.2 Ethernet-based Remote Product Management ................... L–5 L.3.2.1 SNMP Interface .............................
  • Page 23 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A IBS ............................P–1 P.2.1 IBS Clock/Data Recovery and De-jitter ....................P–2 P.2.2 IBS Framing ..............................P–2 P.2.3 IBS Engineering Service Channel ......................P–2 P.2.4 IBS Scrambling ............................P–2 Drop and Insert (D&I) ......................P–3 P.3.1...
  • Page 24 Table B-4. 8-PSK/TCM Coding Summary ....................B–5 Table B-5. Available TPC/ LDPC Modes ..................... B–8 Table B-6. Comparison of all Comtech EF Data TPC/LDPC Modes (CDM-625A with TPC/LDPC Codec) ... B–9 Table B-7. TPC/LDPC Processing Delay Comparison ................B–10 Table B-8. TPC/LDPC Summary ....................... B–10 Table B-9.
  • Page 25 Figure 3-11. Applying Power to the CDM-625A Optional DC Chassis ............. 3–19 Figure 3-12. Replacing CDM-625A Optional DC Chassis Fuses ............... 3–20 Figure 5-1. CDM-625A Web Server (HTTP) Interface – ‘ADMIN | FAST’ page .......... 5–4 Figure 6-1. CDM-625A Front Panel Features .................... 6–1 Figure 6-2.
  • Page 26 Figure A-2. EIA-530 to V.35 DCE Conversion Cable .................. A-3 Figure A-3. RS-232 Remote Control Cable (CDM-625A Remote Control Port to PC 9-Pin Serial Port) ..A-4 Figure B-1. TPC & LDPC Modes Performance (Relative to Shannon Limit) ..........B–7 Figure B-2.
  • Page 27 Figure F-6. Carrier-in-Carrier Signal Processing Block Diagram ..............F–8 Figure 16-1. CDM-625A Ethernet Architecture Design ................K–1 Figure 16-2. Improper Use of External Ethernet Switch with CDM-625A ..........K–2 Figure 16-3. Ethernet Networking Loop Example (Simplified) ..............K–2 Figure 16-4. Networking Loop Example ....................K–3 Figure 16-5.
  • Page 28 CDM-625A Advanced Satellite Modem Revision 0 Table of Contents MN-CDM625A BLANK PAGE xxvi...

  • Page 29: Preface

    PREFACE About this Manual This manual provides installation and operation information for the Comtech EF Data CDM-625A Advanced Satellite Modem. This is a document intended for the persons responsible for the operation and maintenance of the CDM-625A. Conventions and References Patents and Trademarks See all of Comtech EF Data's Patents and Patents Pending at http://patents.comtechefdata.com.

  • Page 30: Recommended Standard Designations

    The CDM-625A is designed for connection to a power system that has separate ground, line and neutral conductors. The equipment is not designed for connection to a power system that has no direct connection to ground.

  • Page 31: Electrical Installation

    The installation and connection to the line supply must be made in compliance to local or national wiring codes and regulations. The CDM-625A is shipped with a line inlet cable suitable for use in the country of operation. If it is necessary to replace this cable, ensure the replacement has an equivalent specification.

  • Page 32: Operating Environment

    CDM-625A Advanced Satellite Modem Revision 0 Preface MN-CDM625A Operating Environment DO NOT OPERATE THE UNIT IN ANY OF THESE EXTREME OPERATING CONDITIONS: • AMBIENT TEMPERATURES LESS THAN 0°C (32°F) OR MORE THAN 50°C (122°F). (MAXIMUM STORAGE TEMPERATURE ALLOWED IS -25°C (-13°F) TO 85°C (185°F)).

  • Page 33: European Union Low Voltage Directive (Lvd) (2006/95/Ec)

    In accordance with the European Union Telecommunications Terminal Equipment Directive 91/263/EEC, do not directly connect the unit to the Public Telecommunications Network. CE Mark Comtech EF Data declares that the unit meets the necessary requirements for the CE Mark. xxxi...

  • Page 34: Product Support

    CDM-625A Advanced Satellite Modem Revision 0 Preface MN-CDM625A Product Support For all product support, please call: +1.240.243.1880 +1.866.472.3963 (toll free USA) Comtech EF Data Headquarters http://www.comtechefdata.com Comtech EF Data Corp. 2114 West 7th Street Tempe, Arizona USA 85281 +1.480.333.2200 xxxii...

  • Page 35: Warranty Policy

    The warranty does not apply to any part of a product that has been installed, altered, repaired, or misused in any way that, in the opinion of Comtech EF Data Corporation, would affect the reliability or detracts from the performance of any part of the product, or is damaged as the result of use in a way or with equipment that had not been previously approved by Comtech EF Data Corporation.

  • Page 36: Exclusive Remedies

    A fixed charge established for each product will be imposed for all equipment returned for warranty repair where Comtech EF Data Corporation cannot identify the cause of the reported failure. Exclusive Remedies Comtech EF Data Corporation’s warranty, as stated is in lieu of all other warranties,...

  • Page 37: Chapter 1. Introduction

    Overview Figure 1-1. CDM-625A Advanced Satellite Modem The CDM-625A Advanced Satellite Modem (Figure 1-1) is intended for both closed network and legacy Intelsat applications. It serves as the replacement for the CDM-625 It is 100% backwards compatible with the CDM-625, but incorporates new features and expansion capability.

  • Page 38: Functional Description

    Data to continue to update the capability of the modem as new technologies emerge. Functional Description The CDM-625A has two fundamentally different types of interface - IF and data: • The IF interface provides a bidirectional link with the satellite via the uplink and downlink equipment.

  • Page 39: Features

    1.3.1 Physical Description The CDM-625A is constructed as a 1RU-high rack-mounting chassis, which can be free-standing if desired. Handles at the front ease placement into and removal from a rack. The CDM-625A modem chassis assembly (CEFD P/N PL-0021325 Standard AC Chassis or CEFD P/N PL-0021327 Optional DC Chassis) is physically comprised of two main card assemblies: •...

  • Page 40: Modem Compatibility

    Modem Compatibility The CDM-625A is fully backwards-compatible with the Comtech EF Data CDM-625, CDM-500, CDM-550, and CDM-550T modems. As an Open Network Modem, the CDM-625A is fully compatible with modems from other manufacturers that are compliant with the IESS- 308/309/310/314 specifications. Note, however, that IESS-315 (VSAT Turbo) defines closed network operation, and this therefore requires modems from the same manufacturer at both ends of the link.

  • Page 41: Verification

    Firmware downloads are available via the Internet from Comtech EF Data’s Web site, via e-mail, or on CD, and can be transferred from an external client PC once connectivity has been established with the modem.

  • Page 42: Optional Hardware And Accessories

    Table 1-1 identifies the available hardware options and accessories that can be factory-installed at the time of ordering, or user-installed in the field. Refer to the specified manual section for further information or details. Contact Comtech EF Data Product Support to purchase any of these products.

  • Page 43: Fully Accessible System Topology (Fast)

    If you wish to upgrade the functionality of a unit at a later date, Comtech EF Data provides Fully Accessible System Topology (FAST), which permits the purchase and activation of options through special authorization codes.
  • Page 44 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A Option Description and Comments Installation Method Data rate 18 kbps to 20.0 Mbps FAST Data rate 18 kbps to 25.0 Mbps FAST Data Rate (LDPC/TPC function) Data rate 18 kbps to 5.0 Mbps BASE UNIT Data rate 18 kbps to 10.0 Mbps...

  • Page 45: Supporting Hardware And Software

    CDM-625A. BUC Support: The CDM-625A incorporates an FSK serial link that can be activated on the Tx-IF port for the purpose of communicating with an FSK-capable “smart” BUC. This link is designed to be compatible with the Global VSAT Forum/ND SatCom specification.

  • Page 46: Physical Features

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1.3.10 Physical Features 1.3.10.1 Dimensional Envelope All dimensions are in inches. Dimensions shown in parentheses are in metric units (mm). Figure 1-2. CDM-625A Dimensional Envelope 1–10...

  • Page 47: Front Panel

    The V FD is an ac tive di splay s howing t wo l ines of 40 characters Vacuum each. It produces a blue light with adjustable brightness. Nested Fluorescent 6.1.3 menus display all available options and pr ompt you to carry out a Display (VFD) req action. Figure 1-3. CDM-625A Front Panel Features 1–11...

  • Page 48: Rear Panel

    (BOTTOM) Optional 48V DC Chassis (CEFD P/N PL-0021327) Figure 1-4. CDM-625A Rear Panel View Figure 1-4 shows the rear panel of the modem. External cables are attached to connectors on the rear panel of the CDM-625A. They comprise: Connector Group Name...

  • Page 49: Summary Of Specifications

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A Summary of Specifications 1.4.1 Modulator Modulation BPSK, QPSK, OQPSK, 8PSK, 8-QAM and 16-QAM Symbol rate range 18 ksps to 12.5 Msps Data rate range 18 kbps - 25 Mbps. See Section 1.4.7...
  • Page 50 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A Scrambling IDR Mode, no RS, - per ITU V.35 (Intelsat variant) IBS mode, no RS - per IESS-309, externally frame synchronized Transparent Closed Network mode, no RS or Turbo coding - per ITU V.35 (Intelsat variant)
  • Page 51 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1–15...

  • Page 52: Demodulator

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1.4.2 Demodulator Note: Data rate range, operating modes, descrambling, input impedance/return loss etc, as per Sect. 1.4.1 Modulator. Input power range, 950-2250 MHz band: desired carrier -130 + 10 (symbol rate) to -80 + 10...
  • Page 53 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 8PSK/TCM CODEC Rate 2/3 8PSK/TCM Rate 2/3 8PSK/TCM BER (with two adjacent Guaranteed Eb/No: w/concatenated RS carriers, each 7 dB higher than (typical value in parentheses) Guaranteed Eb/No: the desired carrier) (typical value in parentheses)
  • Page 54 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A TURBO PRODUCT CODEC Rate 7/8 (Q, OQ) Rate 7/8 (8PSK, 8-QAM) Rate 7/8 (16-QAM) Guaranteed Eb/No: Guaranteed Eb/No: Guaranteed Eb/No: Rate 7/8 QPSK (typical value in parentheses) (typical value in parentheses) (typical value in parentheses)
  • Page 55 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A VersaFEC CODEC BER Rate 0.642 8-QAM Rate 0.711 8-QAM Rate 0.780 8-QAM 8-QAM Guaranteed Eb/No: Guaranteed Eb/No: Guaranteed Eb/No: (With two adjacent carriers, (typical value in (typical value in (typical value in...

  • Page 56: Figure 1-5. Rx Carrier Level Vs. Symbol Rate - L-Band (950-2250 Mhz)

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A Maximum Minimum 1000 10000 100000 Symbol Rate in ksps Figure 1-5. Rx Carrier Level vs. Symbol Rate – L-Band (950-2250 MHz) Maximum Minimum 1000 10000 100000 Symbol Rate in ksps Figure 1-6. Rx Carrier Level vs. Symbol Rate – IF Band (50-180 MHz)

  • Page 57: Data Interfaces

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1.4.3 Data Interfaces Primary Data RS-422/EIA-530 DCE (Rates up to 14 Mbps) 25-pin D-sub (female) (4 selectable modes) (also supports X.21 DCE & DTE up to 2.048 Mbps and 8k ESC orderwire for IDR) V.35 DCE (Rates up to 14 Mbps)

  • Page 58: Automatic Uplink Power Control (Aupc)

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1.4.4 Automatic Uplink Power Control (AUPC) Operating Mode Requires Closed Network Framed mode (EDMAC, D&I++, Enhanced D&I, or ESC++) for transport of Eb/No information from remote modem (EDMAC can be enabled or disabled) Target Eb/No range 0 to 14.9 dB at remote demod (default is 4.0 dB)

  • Page 59: Framing Summary

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1.4.6 Framing Summary Scrambling Available data rates Overhead Additional Reed- Framing Mode Overhead added and format components Solomon Overhead (see Note 1) 200/220 225/205 Basic ITU Transparent None All rates and formats...

  • Page 60: Data Rate Ranges

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1.4.7 Data Rate Ranges UNFRAMED (NO REED SOLOMON) Lower Limit (kbps) Upper Limit (kbps) No FEC, BPSK 18.0 12500 No FEC, O/QPSK 36.0 25000.0 VITERBI, BPSK, 1/2 18.0 6250.0 VITERBI, O/QPSK, 1/2 18.0...
  • Page 61 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A EDMAC, EDMAC-2, or EDMAC-3 (NO REED SOLOMON) Lower Limit (kbps) Upper Limit (kbps) No FEC, BPSK 18.0 12295.0 No FEC, O/QPSK 35.5 24590.1 VITERBI, BPSK, 1/2 18.0 6147.5 VITERBI, O/QPSK, 1/2 18.0 12295.0...
  • Page 62 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A IBS (NO REED SOLOMON) Lower Limit (kbps) Upper Limit (kbps) No FEC, BPSK 64.0 8448.0 No FEC, O/QPSK 64.0 8448.0 VITERBI, BPSK, 1/2 64.0 5859.3 VITERBI, O/QPSK, 1/2 64.0 8448.0 VITERBI, O/QPSK, 3/4 64.0...
  • Page 63 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A ESC++ (NO REED SOLOMON) Lower Limit (kbps) Upper Limit (kbps) No FEC, BPSK 64.0 12304.6 No FEC, O/QPSK 64.0 24609.3 VITERBI, BPSK, 1/2 64.0 5921.0 VITERBI, O/QPSK, 1/2 64.0 12304.6 VITERBI, O/QPSK, 3/4 64.0...
  • Page 64 CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A VersaFEC (ANY MODE) Lower Limit (kbps) Upper Limit (kbps) VersaFEC BPSK Rate 0.488 18.0 5700.0 VersaFEC QPSK Rate 0.533 20.0 10000.0 VersaFEC QPSK Rate 0.631 23.0 10000.0 VersaFEC QPSK Rate 0.706 26.0 10000.0...

  • Page 65: Versafec Adaptive Coding And Modulation (Acm)

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1.4.8 VersaFEC Adaptive Coding and Modulation (ACM) Adaptive Coding and Modulation, using BPSK, QPSK, 8-QAM , 16-QAM and System type VersaFEC short-block LDPC coding - total of 12 ModCods Symbol Rate Range...

  • Page 66: Miscellaneous

    CDM-625A Advanced Satellite Modem Revision 0 Introduction MN-CDM625A 1.4.9 Miscellaneous Front Panel Tactile keypad, 6 keys (Up/Down), Left/Right, Enter/Clear) Vacuum Fluorescent Display (blue) – 2 lines of 40 characters Loopbacks Internal IF loopback, RF loopback, digital loopback, and inward/outward loopback...

  • Page 67: Chapter 2. Installation

    Chapter 2. INSTALLATION Unpacking and Inspecting the Shipment Figure 2-1. Unpacking and Inspecting the CDM-625A The CDM-625A Advanced Satellite Modem, its Installation and Operation Manual, and its power cord were packaged and shipped in a reusable cardboard carton containing protective foam spacing.

  • Page 68: Installing Into A Rack Enclosure

    50 ° (122 For information about custom rack enclosures, contact Comtech EF Data Product Support or visit Comtech EF Data’s Web site (www.comtechefdata.com). • The CDM-625A CANNOT have rack slides mounted to the sides of the chassis. 2–2...

  • Page 69: Figure 2-2. Installing The Cdm-625A Into A Rack Enclosure

    Rail (typical) Unit Front Panel User-supplied Screws Figure 2-2. Installing the CDM-625A Into a Rack Enclosure Mount the CDM-625A in its assigned position in the rack enclosure. Use, as required: • A standard rack-mounted shelf; • User-supplied screws to secure the front panel to the rack enclosure threaded front mounting rails;...

  • Page 70: Installing The Optional Rear-Mounting Support Brackets Kits

    CDM-625A Advanced Satellite Modem Revision 0 Installation MN-CDM625A 2.2.1 Installing the Optional Rear-Mounting Support Brackets Kits Feature Description Back of modem Rack Enclosure Threaded Rear Mounting Rail (typical) Kit / Quantity Item CEFD P/N Description KT/6228-2 KT/6228-3 HW/10-32SHLDR Shoulder Screw, #10...

  • Page 71: Configuring The Cdm-625A

    Connecting the External Cables Chapter 3. REAR PANEL CONNECTORS PINOUTS Having verified correct operation via the Internal IF loop test, enter the desired configuration and then connect all external cables. If difficulties occur, call Comtech EF Data’s Customer Support department for assistance. 2–5...
  • Page 72 CDM-625A Advanced Satellite Modem Revision 0 Installation MN-CDM625A Notes: 2–6...

  • Page 73: Cdm-625A Rear Panel Overview

    (TOP) Standard AC Chassis (CEFD P/N PL-0021325) (BOTTOM) Optional 48V DC Chassis (CEFD P/N PL-0021327) Figure 3-1. CDM-625A Rear Panel View The CDM-625A Advanced Satellite Modem’s rear panel, shown in Figure 3-1, provides all necessary external connections between the modem and other equipment: •...

  • Page 74: Cdm-625A Cable Connections

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A CDM-625A Cable Connections Table 3-1. CDM-625A Rear Panel Cabling Connections Connector Name Connector Type Function Group (Sect) BNC female (70/140MHz band) IF Input Sect. 3.2.1 Type ’N’ female (L-Band)

  • Page 75: If Connection Group

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.1 IF Connection Group There may be DC voltages present on the Type ‘N’ Rx and Tx IF connectors, up to a maximum of 48 volts. 3.2.1.1 Rx IF Connectors...

  • Page 76: Terrestrial Data Connection Group

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.2 Terrestrial Data Connection Group 3.2.2.1 Data Interface (DB-25F) The Data Interface connector is a 25-pin, Type ‘D’ female interface that conducts data input and output signals to and from the modem, and connects to customer’s terrestrial equipment, breakout panel, or...

  • Page 77: Hssi Operation Via The Cic-60 Interface Adapter Module

    6, 18, 20, 21, 22, 23 and 25 are reserved for use by the 1:N system. DO NOT connect signals to any of these pins in this mode. Certain pins have DC voltages present that may damage equipment other than a Comtech EF Data redundancy switch.

  • Page 78: Table 3-3. Cic-60 Module - Hssi/Eia-613 Side Connector Pinouts

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A Table 3-3. CIC-60 Module – HSSI/EIA-613 Side Connector Pinouts Pin # Circuit Signal Function HSSI Signal EIA-613 Circuit Comment Direction (+,-) 1, 26 Signal Ground Ground 2, 27...

  • Page 79: Connectors

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.2.2 G.703 Connectors 3.2.2.2.1 Balanced G.703 (DB-9F) The Balanced G.703 connector is a 9-pin Type ‘D’ female connector. It is used for single port G.703, D&I or D&I++. When used with Quad E1 operations, this connector serves Ports 1 and 2 of the Quad E1 interface.

  • Page 80: Ca-0000163 Adapter Cable

    If all four ports of Quad E1 are needed, the user will need to obtain a quantity of (2X) of any adapter option. For Quad E1 operation, optional Comtech EF Data cabling accessories may be purchased from Comtech EF Data to adapt the Balanced G.703 or Auxiliary G.703 connectors as follows: Figure CEFD Part No.

  • Page 81: Ca-0000164 Adapter Cable

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.2.2.3.2 CA-0000164 Adapter Cable Figure 3-4. CA-0000164 Adapter Cable (DB-9M  (2X) RJ-48F) Table 3-7. CA-0000164 Connector Pinouts Connector Twisted Signal Function Pair – Port 1 or 3 Tx In + –...

  • Page 82: Kt-0000122/Kt-0020570 Quad E1 Balanced/Unbalanced Adapter Cable Kits

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.2.2.3.3 KT-0000122/KT-0020570 Quad E1 Balanced/Unbalanced Adapter Cable Kits Quad E1 Balanced/Unbalanced Adapter Kits Kit / Quantity Part Number Description KT-0000122 KT-0020570 Y-Cable Assembly, 6”, DB-9M  2X RJ-48 Male –...

  • Page 83: Unbal G.703 / Asi - Out (Ido), In (Ddi)

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.2.2.4 Unbal G.703 / ASI – Out (IDO), In (DDI) Connector Type Description Direction G.703 Unbalanced Rx (IDO) / ASI G.703 Unbalanced Tx (DDI) / ASI 3.2.2.2.5 G.703 IDI (Insert Data In), DDO (Drop Data Out)

  • Page 84: Esc (Db-9F)

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.2.5 ESC (DB-9F) The ESC (Engineering Service Channel) port is a 9-pin Type ‘D’ female connector. Table 3-10. ESC Connector Pinouts Pin # Asynchronous Synchronous (R-L) Ground Ground RS-485 Tx Data B in –...

  • Page 85: Alarms (Db-15M)

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.3.2 Alarms (DB-15M) Unit alarms are provided on this 15-pin Type ‘D’ male connector. Table 3-12. Alarm Interface Connector Pinouts Pin # Name Signal Function (L-R) Ground EXT-OFF...

  • Page 86: 1:1 Control (Db-9F)

    CDM-625A Advanced Satellite Modem Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.2.3.4 1:1 Control (DB-9F) The 1:1 Control connector is intended only for connection to a CRS-170A or CRS-180 Redundancy Switch. The 1:1 Control connector is a 9-pin Type ‘D’ female connector.

  • Page 87: Cdm-625A Ground And Power Connections

    Figure 3-6. CDM-625A Chassis Ground Interface (T OP ) S tandard AC C has s is (C E F D P /N P L -0021325)

  • Page 88: Standard 100V/240V Alternating Current (Ac) Power Interface

    T4A ( 250V AC operation) Figure 3-7. CDM-625A Standard AC Chassis (CEFD P/N PL/12587-1) 3.3.2.1 AC Operation – CDM-625A Accessories Contact Comtech EF Data Product Support to purchase any of these available accessories: CEFD P/N Description KT-0020703 AC to 24V DC Conversion Kit...

  • Page 89: Figure 3-8. Applying Ac Power To The Cdm-625A

    3.3.2.3 AC Operation – Replacing Fuses For AC operation the CDM-625A uses two common 5mm x 20mm Slow-blow fuses – one each for line and neutral connections. The fuses are contained within a fuse holder that is press-fit into the body of the IEC power module (located on the rear panel, Figure 3-9).

  • Page 90: Optional 48V Direct Current (Dc) Power Interface

    43 – 60 VDC Nominal Input Voltage 36 – 60 VDC Maximum Connector Type Terminal Block (2X) 5mm x 20mm Slow-blow type fuses: Fuse Protection Modem Fuse: 3Amp/250Volts BUC Fuse: 6.3 Amp/250 Volts Figure 3-10. CDM-625A Optional DC Chassis (CEFD P/N PL-0021327) 3–18...

  • Page 91: Figure 3-11. Applying Power To The Cdm-625A Optional Dc Chassis

    Revision 0 Rear Panel Connectors and Pinouts MN-CDM625A 3.3.3.1 Optional DC Operation – CDM-625A Accessories Contact Comtech EF Data Product Support to purchase any of these available accessories: CEFD P/N Description KT-0020683 DC to AC Conversion Kit for CDM-625A Base Modem...

  • Page 92: Figure 3-12. Replacing Cdm-625A Optional Dc Chassis Fuses

    MN-CDM625A 3.3.3.3 Optional DC Operation – Replacing Fuses For DC operation the CDM-625A requires two different fuses that are contained within the individual screw-in receptacles below the terminal block (located on the rear panel, Figure 3-12). Figure 3-12. Replacing CDM-625A Optional DC Chassis Fuses...

  • Page 93: Chapter 4. Updating Firmware

    If you need a firmware update, once you establish Ethernet connectivity with the unit you can download the update from the Comtech EF Data Web site (www.comtechefdata.com). Alternately, you may obtain it through Comtech EF Data Product Support via e-mail or on CD by standard mail delivery.

  • Page 94: About Firmware Files, Naming, Versions, And Archive Formats

    MN-CDM625A About Firmware Files, Naming, Versions, and Archive Formats Comtech EF Data’s Web site catalogues its firmware update files by product type (e.g., modem, converter, etc.) and specific model/optional configuration. For example, the base modem bulk firmware download hyperlink appears as F0020731*_V### (where ‘###’ indicates the firmware version number, and ‘*’...

  • Page 95: Firmware Update Procedure

    Identify the CDM-625A configuration in use, and its firmware number and current version: A. For the CDM-625A Base Modem, the firmware number and running version can be obtained as follows: From the modem front panel – The firmware version is available from the VFD’s top-level “splash” screen. To •...
  • Page 96 CDM-625A Advanced Satellite Modem Revision 0 Updating Firmware MN-CDM625A Step Task Create a temporary folder (subdirectory) on the user PC for the firmware archive file download. Drive letter “c:” is used in these examples. Any valid, writable drive letter can be used.

  • Page 97: Downloading And Extracting The Firmware Update

    E. On the Modems product page – select the CDM-625A product hyperlink. Select the appr opriate fi rmware E XE or Z IP do wnload hy perlink ( i.e. t he CDM-625A Base M odem, or the CDM-625A with IP Packet Processor without AES Encryption; otherwise, contact Comtech EF Data Product Support to obtain the firmware download for the IP Packet Processor with AES Encryption).
  • Page 98 CDM-625A Advanced Satellite Modem Revision 0 Updating Firmware MN-CDM625A Step Task Confirm availability of the firmware files in the temporary folder. There are a number of ways the user may view the contents of the temporary folder on a Windows-based PC: A.

  • Page 99: Executing The Ethernet Ftp Upload Procedure

    Using Win95 or Win98 – Type “command”. Using WinNT, Win2K or WinXP – Type “cmd”. Type “ping xxx.xxx.xxx.xxx” at the Command-line prompt (where "xxx.xxx.xxx.xxx" is the CDM-625A IP Address). The results should confirm whether or not the modem is connected and communicating.
  • Page 100 IP Packet Processor installed, do NOT reboot at this time – proceed to Step 6 to continue the Ethernet FTP Upload Procedure. From the Admin| R eboot web page, c lick [Reboot N ow]. Both the w eb page and t he CDM-625A front panel will display “Rebooting, Please wait...”...
  • Page 101 FTP upload) then click [Submit] to save this change. Use the Admin| Reboot web page to reboot the system to activate the new firmware: Click [Reboot N ow]. B oth the web page and the CDM-625A front panel w ill d isplay “ Rebooting, P lease wait...
  • Page 102 Revision 0 Updating Firmware MN-CDM625A Step Task G. The system reboot has completed once the CDM-625A front panel displays the top-level “splash” screen: (cont.) Comtech CDM625A Advanced Satellite Modem PktP present Ver 1.1.1 You will need to log in to a new Web session at this time.

  • Page 103: Chapter 5. Fast Activation Procedure

    If you wish to upgrade the functionality of a unit at a later date, Comtech EF Data provides Fully Accessible System Topology (FAST), which permits the purchase and activation of options through special authorization codes.

  • Page 104: Fast Activation Procedure

    Step Task Before contacting Comtech EF Data Product Support to order FAST feature upgrades, obtain and record the modem’s motherboard serial number: From the front panel main menu, SELECT: FAST, and then press [ENTER]. The modem’s 9-digit “Baseboard S/N” is displayed on the bottom line, to the left.
  • Page 105 CDM-625A Advanced Satellite Modem Revision 0 FAST Activation Procedure MN-CDM625A Step Task The m odem r esponds w ith “Configured Successfully” i f th e FAST upgrade i s ac cepted; the m odem then resets to its newly-incorporated default configuration.

  • Page 106: Fast Activation Via The Cdm-625A Web Server (Http) Interface

    Figure 5-1. CDM-625A Web Server (HTTP) Interface – ‘ADMIN | FAST’ page Use the CDM-625A Web Server (HTTP) Interface ‘Admin | FAST’ page (Figure 5-1) for complete management of FAST Features. This page provides scrollable list boxes that display the availability and activation status for all FAST options.
  • Page 107 • activation instructions. When a FAST Access Code is obtained from Comtech EF Data, it will be for a specific option register. The FAST options are linked to two option registers: Register1 is for Data Rate, L-Band, and Framing options.
  • Page 108 CDM-625A Advanced Satellite Modem Revision 0 FAST Activation Procedure MN-CDM625A Notes: 5–6...

  • Page 109: Chapter 6. Front Panel Operation

    The V FD i s an ac tive di splay s howing t wo lines of 40 characters Vacuum each. It produces a blue light with adjustable brightness. Nested Fluorescent 6.1.3 menus (Figure 6-2) display all available options and prompt you to Display (VFD) carry out a required action. Figure 6-1. CDM-625A Front Panel Features 6–1...

  • Page 110: Led Indicators

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.1.1 LED Indicators In general, the Alarm relay state reflects the state of the Front Panel LEDs. For example, if the Unit Status LED is red, the Unit Alarm relay is active, etc. The sole exception is the Transmit Traffic relay –...
  • Page 111 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A State Function BUC or LNB or CSAT or KST fault detected ODU FAULT Flashing Communication fault with BUC or CSAT or KST BUC or LNB or CSAT or KST no fault detected...

  • Page 112: Keypad

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.1.2 Keypad The keypad has an auto-repeat feature. If you hold down a key for more than one second, the key action repeats, automatically, at the rate of 15 keystrokes per second.

  • Page 113: Vacuum Fluorescent Display (Vfd)

    6.1.3.2 Opening Screen The front panel displays provide the visual means to fully control and monitor operation of the CDM-625A. The first screen to display, after turning the power on, is the read-only opening screen: Comtech CDM625A Advanced Satellite Modem Ver1.1.1...
  • Page 114 (SELECT: UtilityEm) or by remote control (remote command EMU=). When emulating a CDM-600 or CDM-600L modem, the CDM-625A opening screen displays the mode of operation, as per this example:...

  • Page 115: Chapter 10. Cdm-625A Odu (Transceiver, Buc, Lnb) Operation

    Utility FAST () Figure 6-2 shows the hierarchal structure of the CDM-625A principle menu tree from the SELECT: menu on down. Press ENTER or CLEAR to immediately access the SELECT: menu screen from the opening screen. From any nested menu, press CLEAR repeatedly until this screen reappears.

  • Page 116: Figure 6-2. Cdm-625A Principle Menu Tree (Fw Ver. 1.1.1)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Figure 6-2. CDM-625A Principle Menu Tree (FW Ver. 1.1.1) 6–8...

  • Page 117: Select: Configuration Menus

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1 SELECT: Configuration Menus CONFIG: Mode Clocks D&I/ACM EDMAC Misc Mask Remote () Use the ◄ ► arrow keys to select from the submenu choices shown, and then press ENTER. The...

  • Page 118: Config: All

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.1 CONFIG: All All = Stop (Stop, Start) Use this menu to configure the unit on a step-by-step basis. Every available configuration menu arrow keys to select Stop or Start, and then press ENTER to displays in succession.

  • Page 119: Config: Mode

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.2 CONFIG: Mode MODE is a key parameter when configuring the modem. To simplify the menu choices, you must first determine the INTERFACE and FRAMING type for both Transmit and Receive. Once these have been selected, you are presented only with menu choices that are applicable to those particular modes.
  • Page 120 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Use the arrow keys to scroll through the available options, and then press ENTER. The ▲▼ available Framing Types are as follows: Framing Type Comments ► None ► IBS (FAST option) ►...

  • Page 121: Config: Tx

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.3 CONFIG: Tx Tx-IF Freq Power FEC Mod Data Scrambler (Data 00192.000kbps, 00131.657ksps) () On the top line – Use the ◄ ►arrow keys to select Tx-IF, Freq, Power, FEC, Mod, Data (Symb when in IP-ACM mode), or Scrambler, and then press ENTER.

  • Page 122: Config: Tx  Freq (Frequency)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A make the modem compatible with certain other manufacturer modems. • Txα (Tx Alpha Filter Rolloff Factor): Use the arrow keys to select 0.05, 0.10, 0.15, 0.25, ▲▼ or the default value of 0.35. Press ENTER when done.
  • Page 123 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A On the bottom line – To edit the Output Power Level, use the ◄ ► arrow keys to first select a digit of the Tx Output Power Level, and then use the arrow keys to change that digit.

  • Page 124: Config: Tx  Power

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Press ENTER when done. CONFIG: Tx  Power  Mode  AUPC  Alarm-Action Max Tx Pwr Action= None (None, Tx-Alm) Rem Demod Unlock Act= Nom-Pwr (Nom,Max) On the top line To determine the action that occurs if the AUPC causes the maximum output –...

  • Page 125: Config: Tx  Fec

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Selection Function Nom (Nominal Power) The output level reverts to the nominal power level set under Manual. Max (Maximum Power) The output level changes to the maximum permitted. Hold The output level is maintained at the value just before the remote demod lost lock.
  • Page 126 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 1. When selecting None for the Encoder setting, the bottom line of the display changes from Reed-Solomon to Diff Encoder (Differential Encoding). The TPC (Turbo) and LDPC encoding selections display only when the optional TPC/LDPC Codec is installed.

  • Page 127: Config: Tx  Mod (Modulation)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.3.5 CONFIG: Tx  Mod (Modulation) Mod=QPSK (B,Q,OQ,8PSK,16Q,8QAM) FEC Rate=1/2 (1/2,3/4,7/8) () Use the ◄ ► arrow keys to select the Modulation type (top line) or the FEC rate (bottom line), and then use the arrow keys to change that parameter selection.

  • Page 128: Config: Tx  Data

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A If selecting ULL from the FEC menu, the options appear as shown: Mod=BPSK (B,Q) () FEC Rate=0.493 (Fixed) 6.2.1.3.6 CONFIG: Tx  Data Tx Data Rate Tx Sub-Mux () ◄ ►...

  • Page 129: Config: Tx  Symb (Ip-Acm Mode Only)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Note that in QDI (Quad D&I) mode, these data rates are read-only! The data rate is the sum of the tributary rates for all ports. You must edit them via the QDI menu.

  • Page 130: Config: Tx  Scrambler

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.3.8 CONFIG: Tx  Scrambler Tx Scrambler = IESS (Normal,IESS,Off) IESS-315 V.35 Scrambler () Use the arrow keys to select Normal, IESS, or Off, and then press ENTER. ▲▼ The modem automatically selects the actual scrambler used for Normal, depending on the exact operating mode: •...

  • Page 131: Config: Rx  Rx-If

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.4.1 CONFIG: Rx  Rx-IF Rx: Acquisition Sweep Range = +/- 032 kHz SpectrumInvert=Off Rxα=.35(.35,.12)() Use the ◄ ► arrow keys to select Acquisition Sweep Range, SpectrumInvert, or Rxα (for Rx Alpha Filter Rolloff Factor), and then press ENTER to continue.

  • Page 132: Config: Rx Freq (Frequency)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.4.2 CONFIG: Rx Freq (Frequency) Rx-IF Frequency: 0050.0000 MHz () To edit the Rx Frequency, use the ◄ ► arrow keys to select a digit to edit, and then use the ▲▼...
  • Page 133 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A On the bottom line – When Reed-Solomon is selectable, use the arrow keys to select On or ▲▼ Off, and then press ENTER. CONFIG: Rx  FEC  Reed-Solomon On Reed-Solomon Decoding =IESS-310(219/201) (Standard(126/110),IESS-310(219/201)) ()

  • Page 134: Config: Rx  Demod (Demodulation)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.4.4 CONFIG: Rx  Demod (Demodulation) Demod=QPSK (B,Q,OQ,8PSK,16QAM) FEC Rate=1/2 (1/2,3/4,7/8) () Use the ◄ ► arrow keys to select Demod (top line) or FEC Rate (bottom line), and then press ENTER.

  • Page 135: Config: Rx  Data

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A If selecting ULL from the FEC menu, the options appear as shown: Demod=BPSK (B,Q) () FEC Rate=0.493 (Fixed) 6.2.1.4.5 CONFIG: Rx  Data Rx Data Rate Rx Sub-Mux () ◄ ►...

  • Page 136: Config: Rx  Symb (Ip-Acm Mode Only)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Note that, in QDI (Quad D&I) mode, these data rates are read-only! The data rate is the sum of the tributary rates for all ports, and you must the data rate via the QDI menu.

  • Page 137: Config: Rx  Descram (Descrambler)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.4.7 CONFIG: Rx  Descram (Descrambler) Rx Descrambler = IESS (Normal,IESS,Off) IESS-315 V.35 Scrambler () Use the arrow keys to select Normal, IESS, or Off, and then press ENTER. ▲▼...

  • Page 138: Config: Rx  Ebno

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A It is particularly useful at higher symbol rates (up to 12.5 Msymbols/second) in situations with long cable runs between equipment (downconverter and modem, for example). The Eb/No estimate is performed after the adaptive equalizer block, which provides an easy way to determine if the equalizer is providing any benefit.

  • Page 139: Config: Clocks

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.5 CONFIG: Clocks Clocking: TxClock RxBuffer/Clock Clock-Ext Freq-Ref Int-Ref-Adjust () Use the ◄ ► arrow keys to select TxClock, RxBuffer/Clock, Clock-Ext, Freq-Ref, or Int-Ref- Adjust, and then press ENTER. 6.2.1.5.1 CONFIG: Clocks  Tx Clock Transmit Clock = Internal(SCT) (Int(SCT),TxTerr(TT),RxLoop, ETTSTRxS) ()

  • Page 140: Config: Clocks  Rx Buffer/Clock

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.5.2 CONFIG: Clocks  Rx Buffer/Clock Clk=Rx-Sat (Rx-Sat,TxTerr,Int(SCT),Ins) Buffer-Size = 00016bytes(00002ms) Center ◄ ► arrow keys to set the Rx Clock (top line) or the Buffer-Size (bottom line). Use the On the top line –...

  • Page 141: Config: Clocks  Clk-Ext (G.703 Clock Extension)

    (T1, E1-B, E1-U) () When selecting TxLock as the mode, the transmit timing of the CDM-625A locks to the timing presented of the interface type selected here. When selecting RxEnable as the mode, the CDM-625A generates a timing signal of the interface type selected here.

  • Page 142: Config: Clocks  Freq-Ref

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.5.4 CONFIG: Clocks  Freq-Ref Frequency Reference: Internal (Internal(with O/P),1,2,5,10MHz) () Use the arrow keys to select one of the two internal reference modes – Internal and ▲▼ Internal (with Output) – and then press ENTER.

  • Page 143: Config: D&I (Drop & Insert)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.6 CONFIG: D&I (Drop & Insert) Appendix E. CLOCK MODES DROP & INSERT (D&I). 1. Drop & Insert operation is a FAST option. 2. D&I (Drop & Insert) is not available when IP-ACM mode is selected.

  • Page 144: Config: D&I  (Drop Or Insert) Chan/Ts (Channel Timeslots)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.6.3 CONFIG: D&I  (Drop or Insert) Chan/TS (Channel Timeslots) Drp-Ch: TS: 01 Ins-Ch: TS: 01 For the Drop-Type or Insert-Type Channel Timeslots, use the ◄ ► arrow keys to select the arrow keys to edit that timeslot’s value.
  • Page 145 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Use the ◄ ► arrow keys to select the port to edit, and then use the arrow keys to edit the ▲▼ number of channels for that port. The cumulative data rate calculates and displays as you edit the number of channels.

  • Page 146: Config: Acm (Adaptive Coding And Modulation) (Ip-Acm Mode Only)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.7 CONFIG: ACM (Adaptive Coding and Modulation) (IP-ACM Mode Only) Appendix M. ADAPTIVE CODING AND MODULATION (ACM) ACM Config: Min/Max-ModCod Unlock-Action Target-EbNo-Margin () Use the ◄ ► arrow keys to select Min/Max-ModCod, Unlock-Action, or Target-EbNo-Margin, and then press ENTER.

  • Page 147: Config: Cnc

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.7.3 CONFIG: ACM  Target-EbNo-Margin Target Eb/No Margin = 1.0 dB (0.0 – 4.5) () Use the arrow keys to select a margin value from 0.0 to 4.5 dB, in 0.5 dB increments. Press ▲▼...

  • Page 148: Config: Cnc  Config: Cnc  Freq-Offset

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A • APC,Side B,C-band • APC,Side B,X-band • APC,Side B,Ku-band • APC,Side B,Ka-band 6.2.1.8.2 CONFIG: CnC  CONFIG: CnC  Freq-Offset CnC Frequency Offset: (range 1-032) +/-015 kHz () Use this menu to enter the maximum expected frequency offset between the outbound interferer and the desired inbound.

  • Page 149: Config: Cnc  Pmsi-Control

    This applies to 1:1 and 1:N systems, and to certain other configurations. In order to use this mode of operation, you must connect the appropriate cable to the PMSI connector on the rear panel of each modem: For 1:N multi-drop applications – Use Comtech EF Data cable P/N CA-0000275; • •...

  • Page 150: Config: Edmac

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.9 CONFIG: EDMAC Appendix H. EDMAC CHANNEL EDMAC Mode= Idle (Idle,Master,Slave) () Embedded Distant-end Monitor And Control (EDMAC) is a Comtech-proprietary framing that permits communication access to the distant-end modem. In order to edit the EDMAC mode, the framing must be set for EDMAC, EDMAC-2, EDMAC-3, or D&I++.

  • Page 151: Config: Misc

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.10 CONFIG: Misc Misc: G.703-LineCode IDR-ESC HSSI Audio-Vol HiRateESC WarmUp Stats MEO () Use the ◄ ► arrow keys to select G.703-LineCode, IDR-ESC, HSSI, RTS, Audio-Vol, HiRateESC, WarmUp, Stats, or MEO and then press ENTER.

  • Page 152: Config: Misc  Hssi

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Use the ◄ ► arrow keys to select the parameter to edit, and then use the arrow keys to ▲▼ select its setting. Press ENTER when done. 6.2.1.10.3 CONFIG: Misc  HSSI This control setting is applicable only when the Data Interface Type is HSSI.

  • Page 153: Config: Misc  Hirateesc

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A keys to change the value. The permitted range of the volumes is –6 dB to +8 dB, in 2 dB steps. Press ENTER when done. 6.2.1.10.6 CONFIG: Misc  HiRateESC...

  • Page 154: Config: Misc  Warm-Up

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A ► High-Rate-Esc operation as On or Off. ► RS-232 or RS-485. ► Baud rate (range depends on other configuration parameters, previously noted). ► Character format (number of data bits, parity, number of stop bits): 8N1 (8-None-1), 7E2 (7-Even-2) or 7O2 (7-Odd-2).

  • Page 155: Config: Misc  Meo

    Modems in an Antenna Handover System when the MEO (Medium Earth Orbit) feature is enabled. Ethernet data traffic is transmitted and received via the Primary and Non-Primary CDM-625A’s four 10/100 Ethernet ports. The Antenna Handover signal received from the user-provided IF/RF switch determines which modem is the ONLINE or OFFLINE unit: •...

  • Page 156: Config: Mask

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.10.9.1 CONFIG: Misc  MEO Antenna Handover Antenna Handover: Enabled DPD = 00 Mode = Manual () Use the ◄ ► arrow keys to navigate to the proper line: First, on the top line – Use the ◄...

  • Page 157: Config: Mask  Buffer Or Ref

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A • Selecting Rx-Sat-AIS as Active generates a fault whenever the demodulator senses that the ‘all ones’ condition is present in the receive data. • Typical for either, selecting AIS as Masked generates no alarms.

  • Page 158: Config: Mask  Txsat (Satellite Tx Alarms)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A • Selecting the Tx Clock Alarm as Active generates a Tx Traffic alarm if a G.703 interface is active and the input is lost or removed, or if selecting another interface type where the Tx Clock mode is External and the clock is lost or removed.
  • Page 159 Although selectable/viewable, this mask is reserved for the RAN Optimization option card which, at present, is not supported. It will be supported in a future release. 6.2.1.11.9 CONFIG: Mask  BUC Chapter 10. CDM-625A ODU (TRANSCEIVER, BUC, LNB) OPERATION BUC alarm = Active (Active,Mask) Attach to Tx alarm = No (Yes,No)()

  • Page 160: Config: Remote (Remote Control)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.12 CONFIG: Remote (Remote Control) Remote Control=Local (Local,Serial remote,Ethernet) () Use the arrow keys to select Local, Serial remote, or Ethernet, and then press ENTER. ▲▼ If selecting Local, then reconfiguration via Serial Remote or Ethernet is not permitted although remote monitoring is still possible.
  • Page 161 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A CONFIG: IP  Addresses  MAC Ethernet MAC Address: 00-06-B0-00-01-06 (read-only) This read-only screen displays the unit MAC address. Press ENTER or CLEAR to return to the previous menu. CONFIG: IP  Addresses  Gateway Ethernet IP Gateway: 192.168.001.002...
  • Page 162 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A To edit the SNMP Read Community string, use the ◄ ► arrow keys to select a character to edit, and then use the arrow keys to edit that character. ▲▼...

  • Page 163: Config: Ip  Setup

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A All printable ASCII characters are available with the exception of the backslash (ASCII code 92) and ~ (ASCII code 126). Press ENTER after composing the SNMP Traps Community String. All trailing spaces are removed from the string upon entry.
  • Page 164 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A CONFIG: IP  IP Setup  WAN WAN: Buffer Length = 240ms Avg Buffer Fill State = 00% () On the top line – Use the arrow keys to edit the WAN Buffer Length, and then press ENTER.
  • Page 165 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A The actual negotiated speed (NegoSpeed:) is provided here as a read-only status display. On the bottom line – Use the arrow keys to edit the desired speed setting. Note the ▲▼...
  • Page 166 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A CONFIG: IP  IP Setup  MAC-Learning Unit power must be cycled whenever MAC Learning mode is enabled or disabled. MAC learning: Off (Off, On) () MAC Learning is an Ethernet switch function that allows the LAN (user) side of the Ethernet ports to learn the MAC addresses of the equipment connected to those ports.
  • Page 167 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A CONFIG: IP  IP Setup  VLAN  PortMode Port Mode: Port1 Port2 Port3 Port4 () ◄ ► arrow keys to select Port1, Port2, Port3 or Port4, and then press ENTER.
  • Page 168 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A • ACT – Choose an action to undertake for the selected VLAN ID – NONE (default), Edit, or Del (Delete). • P1 (Port1) through P4 (Port4) – With ACT=Edit active, you may update the selected port’s behavior attributes, as assigned under the selected VLAN ID.
  • Page 169 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A • Delete the selected VLAN ID. After targeting a VLAN ID for deletion, use the ◄ ► arrow keys to select the ACT parameter, and then use the arrow keys to select ACT=Del.
  • Page 170 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A You must follow these rules when creating or adding a VLAN table entry: • The VLAN ID (0001-4095) must be unique – it cannot be a duplicate of any previously assigned VLAN ID, including PVIDs in the VLAN ID table.
  • Page 171 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A CONFIG: IP  IP Setup  QoS (Quality of Service) Appendix R. QUALITY SERVICE (QoS) QoS functionality is dependent on whether the optional IP Packet Processor card is either a) not installed or installed but disabled, or b) installed and enabled.
  • Page 172 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A CONFIG: IP  IP Setup  QoS L3 QoS When the optional IP Packet Processor card is either not installed or installed but disabled, and L3 QoS is selected, this menu is disabled and appears as follows:...

  • Page 173: Config: Ip  Ant (Advanced Network Timing)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A IP Stats Type Available Statistics (Use ▲▼ to select) (Use ◄ ► to navigate to the bottom line, and then ▲▼ to display a desired statistic) • WAN HDLC Frames In / Out...

  • Page 174: Config: Ip  Ant  Sntp (Simple Network Time Protocol)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Use the arrow keys to select SNTP or PTP, and then press ENTER. ▲▼ 6.2.1.13.4.1 CONFIG: IP  ANT  SNTP (Simple Network Time Protocol) SNTP: Disabled (Disabled, Enabled) Servers: Primary Backup ()

  • Page 175: Config: Ip  Ant  Ptp (Precision Time Protocol)

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.1.13.4.2 CONFIG: IP  ANT  PTP (Precision Time Protocol) Sect. K.7.3 Precision Time Protocol (PTP) (Appendix K. ETHERNET NETWORK CONFIGURATION) 1. If the optional IP Packet Processor card is installed and enabled, then the CONFIG: IP ...

  • Page 176: Config: Ip  Pktp-Enable

    Revision 0 Front Panel Operation MN-CDM625A After defining and enabling an access list via SNMP or the CDM-625A Web Server interface ‘Admin | Access’ page, functionality of this menu appears as follows: Host Access List is Enabled Disable the List: No (N,Y) ()

  • Page 177: Select: Test Menus

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.2 SELECT: Test Menus TEST: Mode BERT () CnC-APC-Monitor Uncorrected-BER Use the ◄ ► arrow keys to select Mode, BERT, CnC-APC-Monitor, or Uncorrected-BER, and then press ENTER. SELECT: TEST  Mode 6.2.2.1...

  • Page 178: Figure 6-3. Loopback Modes

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Figure 5-3 illustrates the IF, Digital, and I/O Loopback Test modes. Figure 6-3. Loopback Modes 6–70...

  • Page 179: Select: Test  Bert

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A SELECT: TEST  BERT 6.2.2.2 BERT: Config Monitor () Use the ◄ ► arrow keys to select Config or Monitor, and then press ENTER. 6.2.2.2.1 SELECT: TEST  BERT  Config...

  • Page 180: Select: Test  Uncorrected-Ber

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Note that, when CnC-APC is disabled, this menu is inaccessible and displays the following message: CnC-APC is disabled. () SELECT: TEST  Uncorrected-BER 6.2.2.4 Uncorrected BER < 5.0E-6 In order for a valid test run, you must first configure the modem with Viterbi, VersaFEC CCM, or ULL (Ultra Low Latency) FEC.

  • Page 181: Select: Monitor Menus

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.3 SELECT: Monitor Menus Monitor: Live-Alarms Stored-Events ACM Statistics Rx-Params AUPC IP () Use the ◄ ► arrow keys to select Live-Alarms, Stored-Events, ACM, Statistics, Rx-Params, AUPC, CnC, or IP, and then press ENTER 6.2.3.1...

  • Page 182: Monitor: Stored Events

    IDR Tx BW1-4 by the modem’s IDR framer, of a corresponding Tx backward alarm. Chapter 10. CDM-625A ODU (TRANSCEIVER, BUC, LNC) OPERATIONS 6.2.3.2 Monitor: Stored Events Stored Events:...

  • Page 183: Monitor: Acm

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A The event log can store up to 255 events. When a fault condition occurs, it is time- and date- stamped and put into the log. Similarly, when the fault condition clears, this is also recorded.
  • Page 184 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A For statistics logging, you first define a measurement interval (see CONFIG: Stats); then, during this interval, you will observe Eb/No, Transmit Power Level Increase (TPLI), and Receive Signal Level (RSL) at a rate of once every second.

  • Page 185: Monitor: Rx Parameters

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Press ENTER or CLEAR when done viewing to return to the previous menu, or use the ◄ ► arrow keys to select the Clear-All option. Then, at the prompt, use the arrow keys to select Yes or ▲▼...

  • Page 186: Monitor: Ip Statistics

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.3.8 Monitor: IP Statistics IPstats: Port x () Unicasts: 00000003 00000023 Clr:N This screen is identical to and displays the same performance information as the screen shown in Sect. 6.2.1.13.3 CONFIG: IP  Setup  Stats.

  • Page 187: Info: Mode

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.4.3 Info: Mode Info: Mode: Tx= G.703B:D&I (B8ZS) Rx= G.703B:IBS (B8ZS) An example of a Mode Info screen is shown here. 6.2.4.4 Info: Tx Tx:On 0070.0000MHz PWR=-20.0 TSI=N Vit+RS:220/200 00064.000 QPSK Scrm An example of the Tx Info screen is shown here.

  • Page 188: Info: Clocks

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Item Configuration Setting FEC type: Viterbi, TCM, Vit+RS, TCM+RS, TPC, LDPC, VFEC, or Decoder None:DE-xxx (DE is the Differential Encoder setting, shown as DE-Off or DE-On). Data Rate xxxxx.xxx kbps (an asterisk * indicates that the data sense is inverted).

  • Page 189: Info: Insert

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.4.9 Info: Insert Insert Type= CH:1 E1-CCS TS:01 An example of an Insert Info screen is shown here. This screen shows the Insert Type and channel allocations. Press ENTER or CLEAR to return to the previous menu.

  • Page 190: Select: Store/Ld (Store/Load) Menus

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.5 SELECT: Store/Ld (Store/Load) Menus Configuration #2: Load Store () AVAILABLE You can store up to 10 modem configurations into an assigned “slot” – 0 through 9. If a configuration slot is available for storage, the bottom line notes the status of that slot as AVAILABLE.

  • Page 191: Select: Utility Menus

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.6 SELECT: Utility Menus Utilities: Set-RTC Display-Bright CarrID Redundancy Circuit-ID Firmware ◄ ► Use the arrow keys to select Set-RTC, Display-Bright, CarrID, LED, Redundancy, Circuit-ID, Firmware, or Em, and then press ENTER 6.2.6.1...

  • Page 192: Utilities: Led

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A 6.2.6.4 Utilities: LED Front Panel LED Test: Enabled (Enable,Disable) () Use the arrow keys to select Enable or Disable, and then press ENTER to continue. When ▲▼ enabled, a test of all of the LEDs on the front panel is executed. Normal operations resume upon completion of the test.

  • Page 193: Utilities: Circuit-Id

    CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A When the unit is connected to a 1:N switch, a red LED located on the rear panel labeled “1:N Active!” indicates that caution is required, as there may be DC voltages and other control signals present on certain pins on the 25-pin Data Interface connector.

  • Page 194: Utilities: Firmware

    Image#1* Image#2 Select () Use these submenus to view information about the CDM-625A Base Modem internal firmware. This screen identifies the firmware image that is loaded on startup or reboot of the Base Modem with an asterisk (*). Use the ◄...

  • Page 195: Utilities: Firmware  Packet-Processor

    Boot-ROM Image#1* Image#2 Select () This screen identifies the optional CDM-625A IP Packet Processor internal firmware image that is loaded on startup or reboot of the Base Modem with an asterisk (*). ◄ ► Use the arrow keys to select Boot-Rom, Image#1, Image#2, or Select, and then press ENTER.

  • Page 196: Utilities: Em (Cdm-600/600L Emulation)

    SWR? remote query reflects that of the emulated modem’s firmware version number. There are some features that the CDM-625A does not support, and as a result are not possible while in CDM-600 or CDM-600L Emulation Modes: •...

  • Page 197: Select: Fast Menus

    The modem identifies each ▲▼ selected FAST option as “installed” or “not installed”. You must contact Comtech EF Data Product Support to purchase the FAST Access Code for the desired option. Available options include: ►...

  • Page 198: Fast: Options  Set Register1 Or Set Register

    It is important to use the appropriate FAST access code for the appropriate register. Contact Comtech EF Data Product Support to order the desired options (see Sect. 6.2.8.1.1) – be prepared to provide the Modem Serial Number. The Comtech EF Data Product Support representative will verify the order and provide an invoice and instructions, including a register- specific 20-digit FAST Access Code.

  • Page 199: Fast: Demo-Mode

    FAST Options Demo Mode: Off (Off,On) () 1209600 seconds remaining. FAST Options Demo Mode allows access to ALL CDM-625A FAST options for 2592000 seconds (30 calendar days). On the top line, use the arrow keys to select Demo Mode as Off or On, ▲▼...

  • Page 200: Fast: Cnc

    When the counters expire, the following message is displayed: Fractional CnC is not installed. As per the previous screen examples, if Fractional CnC is not installed in the CDM-625A, the modem displays a message that no CnC license is installed and provides “time remaining” and “time remaining refill”...
  • Page 201 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A phantom fault every 12 hours, allowing the Full License CnC modem to return online if its fault has cleared. • 90-DayCounter – This is the amount of time, in seconds, that that the modem can be run in CnC mode.
  • Page 202 CDM-625A Advanced Satellite Modem Revision 0 Front Panel Operation MN-CDM625A Notes: 6–94...

  • Page 203: Introduction

    Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT Introduction The CDM-625A Advanced Satellite Modem base unit is equipped with four RJ-45 10/100 BaseT Ethernet connectors, subject to the following conditions: • When Dedicated Management is disabled, you may use any port for Ethernet-based remote product management (monitor and control) purposes.

  • Page 204: Snmp Interface

    CDM-625A modem through FSK. MIB file FW-0020743*.mib MIB file consists of a subset of the CDM-625A MIB with all OIDs used manage to a distant-end CDM-625A. SNMP "gets" and "sets" are sent to the local CDM-625A DistantEnd CDM-625A MIB and EDMAC3 is used to communicate efficiently with the distant end modem.

  • Page 205: Snmp Community Strings

    Trap Community default = comtech For proper SNMP operation, the CDM-625A MIB files must be used with the associated version of the CDM-625A Advanced Satellite Modem M&C. Refer to the CDM-625A FW Release Notes for information on the required FW/SW compatibility.
  • Page 206 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A The CDM-625A supports the following Alarms and Faults SNMPv1 traps / SNMPv2 notifications: Alarms and Faults SNMPv1 traps cdm625aUnitAlarmV1 6247641 cdm625aTxTrafficAlarmV1 6247642 cdm625aRxTrafficAlarmV1 6247643 cdm625aOpenNetworkAlarmV1 6247644 cdm625aBUCAlarmV1 6247645 cdm625aLNBAlarmV1...

  • Page 207: Telnet Interface

    Ethernet-based Remote Product Management MN-CDM625A Telnet Interface Comtech EF Data provides a Telnet interface for the purpose of equipment monitor and control (M&C) using either the standard remote control protocol or, when the optional IP Packet Processor is installed and enabled , the Telnet Command Line Interface (CLI).
  • Page 208 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A In order to view the full response messages, use of the HyperTerminal terminal emulation program configured as a Telnet client is permissible. Configure HyperTerminal as follows: 1. Be sure to properly define the “Connect To” Telnet connection properties (File ...

  • Page 209: Using The Telnet Interface For Telnet Command Line Interface (Cli) Operation

    1. The CDM-625A Telnet Command Line Interface (CLI) is accessible only when the optional IP Packet Processor is installed and enabled . 2. The CDM-625A Telnet CLI uses Telnet TCP Port 107 . Be sure to specify this port when configuring your terminal emulator for CLI operation.

  • Page 210: Web Server (Http) Interface

    MN-CDM625A Web Server (HTTP) Interface A user-supplied Web browser allows the full monitor and control (M&C) of the CDM-625A from its Web Server Interface. The CDM-625A’s embedded web application is designed for, and works best with, Microsoft’s Internet Explorer Version 9.0 or higher. Comtech EF Data does not recommend setting your browser to IE7 Compatibility Mode.

  • Page 211: Navigation

    Ethernet-based Remote Product Management MN-CDM625A remote control for the CDM-625A has not been set to Ethernet mode, access is blocked and the following error message displays in the browser window: Click [Enable Ethernet Mode] to switch over from your current mode to Ethernet Mode.

  • Page 212: Drop-Down Lists

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Click an action button to do one of these tasks: • Refresh the page with current data. • Reset changed parameters to remove unsaved changes. • Submit (permanently save) changes.

  • Page 213: Figure 7-2. Cdm-625A Web Server (Http) Interface Menu Tree (Fw Ver. 1.1.1)

    Pages marked with double asterisks (**) are operable only when the specified auxiliary products, such as BUCs or LNBs, are installed. The menu tree diagram (Figure 7-2) lists the features available through the CDM-625A Web Server (HTTP) Interface. This interface features six navigation tabs (shown in blue). Primary page tabs (green) and nested page tabs (yellow) provide access to individual Web pages.

  • Page 214: Conditional Access To Ip Packet Processor Pages

    Conditional Access to IP Packet Processor Pages Carefully review the information in this section. A significant number of pages in the CDM-625A Web Server Interface address operation of the CDM-625A when equipped with the optional IP Packet Processor card. These pages are accessible only when the optional IP Packet Processor card is installed and enabled .

  • Page 215: Web Server Page Descriptions

    Ethernet-based Remote Product Management MN-CDM625A The CDM-625A Web Server Interface menu tree diagram (Figure 7-2) indicates those primary and nested IP Packet Processor pages having conditional access and operation with an asterisk (*). Further, each interface page subsection (under Sect. 7.5.4 Web Server Page Descriptions)

  • Page 216: Home | Contact

    Use this section to provide your contact information to Comtech EF Data when you submit a Problem Report. Problem Report Use this section to compose a message of up to 256 characters maximum to Comtech EF Data. Be sure to provide your Contact Information, and then click [Submit Email] to send the message.

  • Page 217: Admin Pages

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.2 Admin Pages Use these pages to set up user access, manage the firmware load preferences, and activate FAST features. The Admin pages are available only to users who have logged in using the Administrator Name and Password.
  • Page 218 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A o SMTP Domain Name – Specify the domain of the e-mail server (usually found to the right of the @ symbol in an e-mail address). o SMTP Domain Destination – Specify the e-mail recipient name (usually found to the left of the @ symbol in an e-mail address).

  • Page 219: Admin | Snmp

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.2.2 Admin | SNMP • Chapter 6. FRONT PANEL OPERATION • Sect. 7.3 SNMP INTERFACE The Administrator must use this page to set and return administration information for the CDM- 625A SNMP (Simple Network Management Protocol) feature.

  • Page 220: Admin | Firmware Pages

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.2.3 Admin | Firmware Pages Chapter 4. UPDATING FIRMWARE Click the Base Modem tab, or when the optional IP Packet Processor card is installed, the Packet Processor tab to continue.

  • Page 221: Admin | Firmware | Packet Processor

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Currently Running (read-only) The current running image is identified here. Next Reboot, will use Use the drop-down list to select Image 1 or Image 2 as the image to use upon next reboot, and then click [Submit] to save this selection.

  • Page 222: Admin | Reboot

    7.5.4.2.4 Admin | Reboot Use this page to perform a soft reboot of the CDM-625A using the current, active firmware Image as selected on the ‘Admin | Firmware | Base Modem’ page (Sect. 7.5.4.2.3.1) and/or the ‘Admin | Firmware | Packet Processor’ page (Sect. 7.5.4.2.3.2).

  • Page 223: Admin | Fast

    Figure 7-10. Admin | FAST page FAST code When you obtain a FAST access code from Comtech EF Data, it will be for a specific option register. Carefully enter each register-specific 20-character FAST access code in sequence , and then click [Submit FAST code] when done. A message will display at the top of this section that states whether or not the codes are accepted or if the upgrade is successful.

  • Page 224: Admin | Utilities

    MN-CDM625A Demo Time Remaining: FAST Options Demo-Mode allows access to ALL CDM-625A FAST options* for 30 calendar days. This section displays the remaining time in days, hours, and minutes. * The AES Feature is available only when the CDM-625A is equipped with the optional IP Packet Processor with AES software.

  • Page 225: Configuration Pages

    Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3 Configuration Pages Use the ‘Configuration’ pages to configure all operating parameters for the CDM-625A, including its ODUs (Outdoor Units) when connected. Click the Modem, LAN, Routing, WAN, Overhead, Utilities, D&I, BUC, or LNB tab to continue. 7.5.4.3.1 Configuration | Modem Chapter 6.

  • Page 226: Configuration | Lan Pages

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.2 Configuration | LAN Pages Click the IP tab, or – when the optional IP Packet Processor card is installed and enabled – the ARP tab to continue. 7.5.4.3.2.1 Configuration | LAN | IP Figure 7-13.
  • Page 227 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A • L2 QoS (Layer 2 QoS) – Use the drop-down list to select this feature as Off, VLAN only, Port only, or VLAN & Port. L2 QoS can be enabled only when the optional IP Packet Processor is disabled •...
  • Page 228 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Sect. 7.5.4.3.4 Configuration | Managed Switch o Router Point-to-Point – Functions as a point-to-point router in Point-to-Point configurations. o Router Multipoint Hub – Functions as the Hub side router in a Point-to-Multipoint network.
  • Page 229 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Click [Submit Port Cnfg] to save these settings. VLAN Mode VLAN Mode is supported in Managed Switch Mode, with or without the optional IP Packet Processor enabled • VLAN Mode – Use the drop-down list to select the mode as Disabled or Enabled.

  • Page 230: Configuration | Lan | Arp

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A • VLAN Table – This read-only table provides the user with the status for VLAN entry on a per- ID (0001-4095) and per-Port (1-4) basis, where U=Untagged, T=Tagged, and F=Filtered.
  • Page 231 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Click [Submit Changes] to save these settings. Add Static ARP This section allows you to directly add a static ARP entry. Note that the index will automatically increment to the next available number.

  • Page 232: Configuration | Routing Pages

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.3 Configuration | Routing Pages The nested Routes, IGMP, and DHCP pages are accessible only to Admin users and when the optional IP Packet Processor card is installed and enabled .
  • Page 233 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Column Description Header Comp. When the optional Header Compression FAST feature is available, use the drop-down list to Disable or Enable operations. Payload Comp. When the optional Payload Compression FAST feature is available, use the drop-down list to Disable or Enable operations.

  • Page 234: Configuration | Routing | Igmp

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.3.2 Configuration | Routing | IGMP This page permits use of Internet Group Management Protocol (IGMP) with configured multicast routes. IGMP, when enabled, responds to IGMP queries for the configured multicast routes on the transmit side and generates IGMP queries on the receive side.
  • Page 235 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A • Query Response Interval – This is the maximum response time inserted into the periodic general queries. By varying the Query Response Interval, a modem administrator may tune the “burstiness” of IGMP messages on the subnet; note that larger values make the traffic less “bursty”...

  • Page 236: Configuration | Routing | Dhcp

    This prevents two devices from accidentally being configured with the same IP Address. The CDM-625A DHCP Relay feature allows you to deploy a single DHCP server at the hub that manages all of the devices throughout your remote networks. When a device on the CDM- 625A's network issues a DHCP request, it is relayed to the DHCP server as specified by the "DHCP Server IP Address".

  • Page 237: Configuration | Routing | Dns

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.3.4 Configuration | Routing | DNS Use this page to manage DNS (Domain Name System) caching. DNS caching provides an efficient way for DNS to keep the Internet synchronized as the IP addresses of some servers change and as new servers come online.

  • Page 238: Configuration | Managed Switch

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.4 Configuration | Managed Switch The features on this nested page are accessible only to Admin users and when the optional IP Packet Processor card is installed and enabled .
  • Page 239 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A o Select Key 1 through Key 8 to use the key specified in the Encryption/Decryption Configuration Page (Sect. 7.5.4.3.5.3) to encrypt WAN traffic. o Select Disable to force the IP Module to not encrypt any WAN traffic.

  • Page 240: Configuration | Wan Pages

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.5 Configuration | WAN Pages The nested QoS, Compression, and Encryption pages are accessible only to Admin users and when the optional IP Packet Processor card is installed and enabled .

  • Page 241: Configuration | Wan | Qos Pages – Max/Priority, Min/Max Modes

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.5.1.1 Configuration | WAN | QoS Pages – Max/Priority, Min/Max Modes Figure 7-20. Configuration | WAN | QoS Pages (TOP) QoS Control Mode = Max/Priority (BOTTOM) QoS Control Mode = Min/Max (Banner, Menu Bar not shown)
  • Page 242 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A QoS Rules Table For the ‘Max/Priority’ page: For the ‘Min/Max’ page: This section displays all existing QoS Rules Table entries. From left to right: Column Description Index This is the internal table index that is automatically assigned and cannot be edited.
  • Page 243 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A For the “Min/Max” page: From left to right: Column Description Protocol Use the drop-down list to select the Protocol as UDP, TCP, ICMP, RTP, VOICE, VIDEO, RTPS, FTP, HTTP, TELNET, SMTP, SNMP, All-IP, Non-IP, or All.
  • Page 244 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Delete Rule This section is identical for both the “Max/Priority” and “Min/Max” pages. Enter Rule Index to Delete, and then click [Delete Rule] to execute deletion of the specified rule from the QoS Rules Table.

  • Page 245: Configuration | Wan | Qos Pages – Diffserv Mode

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.5.1.2 Configuration | WAN | QoS Pages – DiffServ Mode QoS can be set to DiffServ Mode to make it fully compliant to the Differentiated Services QoS RFC (Request For Comments) standards.
  • Page 246 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A The user has the option of configuring each queue to one of the following attributes (the acceptable ranges are shown in brackets): Column Description Service Rate [ -0.000 / (Tx Data Rate)] The minimum bandwidth will be s erved first among the Assured F orwarding (ASFD) c lasses in case of band width availability once Class Selector 7 through Class Selected 1 have been serviced.

  • Page 247: Configuration | Wan | Compression

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.5.2 Configuration | WAN | Compression Use this page to configure the optional Payload and Header Compression, when this FAST feature is enabled. Figure 7-22. Configuration | WAN | Compression page Compression Availability This section provides a hyperlink to the ‘Configuration | Managed Switch’...

  • Page 248: Configuration | Wan | Encryption

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Payload Compression • Payload Comp. Refresh Rate – Enter for the Payload Compression refresh rate, in number of packets, from 1 to 255. 7.5.4.3.5.3 Configuration | WAN | Encryption This page allows configuration of the optional AES Encryption, when this FAST feature is enabled.
  • Page 249 For situations where, for example, export restrictions prohibit the availability of the AES Encryption option, the CDM-625A runs an FPGA chipset that does not allow encryption operations. The ‘Configuration | WAN | Encryption’ page is therefore disabled: The page, when...
  • Page 250 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Alternately, click [Clear] to reset a previously programmed entry to all zeroes, and then re-enter the new key string as instructed here. Up to eight keys may be programmed for each function; once set, a specified Encryption Key may then be selected for active use via the ‘Configuration | Routing | Routes’...

  • Page 251: Configuration | Overhead

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.6 Configuration | Overhead This page appearance is dependent on whether Carrier-in-Carrier Automatic Power Control (CnC-APC) Mode is selected. Chapter 6. FRONT PANEL OPERATION Figure 7-24. Configuration | Overhead page...
  • Page 252 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Use this page to configure the following overhead interfaces: • ESC including Tx / Rx IDR Esc Type, Audio Volume, High Rate ESC • IDR Backward Alarms for Tx 1-4 and Rx 1-4 •...

  • Page 253: Configuration | Utilities

    MN-CDM625A 7.5.4.3.7 Configuration | Utilities Use this page to configure a number of the CDM-625A’s utility functions. Figure 7-25. Configuration | Utilities page Redundancy If the unit is part of a 1:1 redundant pair of modems, and this unit is currently online, click [Force 1:1 Switch] to cause the unit to switch to standby.
  • Page 254 It is IMPORTANT to understand that Carrier ID and Circuit ID, while named similarly, are two distinct features of the CDM-625A. Read your documentation carefully. With Carrier ID enabled , the first 24 characters of the 40-character Circuit ID are intended for and sent as the MetaCarrier Custom Message.
  • Page 255 [Update] to refresh a test already in progress. Save / Load (Save takes precedence over Load) The Save/Load feature stores and retrieves the CDM-625A Base Modem settings only . It does not include the optional IP Packet Processor settings. As a safeguard, to prevent any inadvertent action the Save Location and Load Location drop- down lists’...

  • Page 256: Configuration | D&I (Drop And Insert)

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.8 Configuration | D&I (Drop and Insert) • For D&I configuration information: Chapter 6. FRONT PANEL OPERATION For D&I functionality overview: Appendix E. CLOCK MODES DROP AND • INSERT (D&I).

  • Page 257: Configuration | Buc (Block Up Converter)

    Configuration | BUC (Block Up Converter) Chapter 10. CDM-625A ODU (TRANSCEIVER, BUC, LNB) OPERATION After configuring the CDM-625A for L-Band operation, and when a Block Up Converter (BUC) is installed, you may use this page to configure its operating parameters and to view the BUC operational status.

  • Page 258: Configuration | Ant (Advanced Network Timing) Pages

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.11 Configuration | ANT (Advanced Network Timing) Pages Sect. K.7 Advanced Network Timing (ANT) (Appendix K. ETHERNET NETWORK CONFIGURATION) The ANT feature provides IP-based protocols to synchronize the modem's internal time-of-day clock to an external device such as a time server, Base Station Controller (BSC), or Radio Network Controller (RNC).
  • Page 259 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A If Enabled, PTP is used to establish independent Wireless Receiver/Transmitter (WRT) protocol segments – one for LAN and the other for WAN. If Disabled, by default the availability of the PTP protocol is dependent on the near-end (e.g., the RNC/BSC) and distant-end (e.g., the BTS) IEEE 1588v2 (PTP) capable network devices in the network.

  • Page 260: Configuration | Ant | Sntp (Simple Network Timing Protocol)

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.3.11.2 Configuration | ANT | SNTP (Simple Network Timing Protocol) Sect. K.7.1 Simple Network Timing Protocol (SNTP) (Appendix K. ETHERNET NETWORK CONFIGURATION) Simple Network Time Protocol (SNTP) is used to synchronize computer clocks throughout a computer network when the ultimate performance of the full NTP implementation as per RFC-1305 (Requests for Comment No.

  • Page 261: Configuration | Meo (Medium Earth Orbit)

    Modems in an Antenna Handover System when the MEO (Medium Earth Orbit) feature is enabled. Ethernet data traffic is transmitted and received via the Primary and Non-Primary CDM-625A’s four 10/100 Ethernet ports. The Antenna Handover signal received from the user- provided IF/RF switch determines which modem is the ONLINE or OFFLINE unit: •...

  • Page 262: Status Pages

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A • Differential Path Delay – Enter a DPD limit value from -30 to +30. Click [Submit] to save these settings. 7.5.4.4 Status Pages The Status pages provide you with status, event logging, and operational statistics windows.

  • Page 263: Status | Modem Logs

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.2 Status | Modem Logs Chapter 6. FRONT PANEL OPERATION Click the Base Modem tab, or – when the optional IP Packet Processor card is installed and enabled – the Packet Processor tab to continue.
  • Page 264 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A • Initialize Events Pointer – Click to reset the log’s internal pointer. • Unread Events – Displays the total number of unread stored events in the scrollable events window. As stored event groups are displayed, this number decrements accordingly.

  • Page 265: Status | Modem Logs | Packet Processor

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.2.2 Status | Modem Logs | Packet Processor This nested page is accessible only to Admin users and when the optional IP Packet Processor card is installed and enabled .

  • Page 266: Status | Modem Info

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.3 Status | Modem Info Use this page to view read-only information about the currently configured modem: • General Information • Equipment ID • Scrollable windows listing Installed Options and available Options – Not Installed Figure 7-35.

  • Page 267: Status | Traffic Statistics Pages

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.4 Status | Traffic Statistics Pages Click the Ethernet, WAN, or Clear Counters tab – and, when the optional IP Packet Processor card is installed and enabled – the Router, Managed Switch, WAN, Compression, QoS, PTP, MAC Table, or Clear Counters tab to continue.

  • Page 268: Status | Traffic Statistics | Router

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.4.2 Status | Traffic Statistics | Router This nested page is accessible only to Admin users and when the optional IP Packet Processor card is installed and enabled . See Sect.

  • Page 269: Status | Traffic Statistics | Managed Switch

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.4.3 Status | Traffic Statistics | Managed Switch This n ested p age i s accessible o nly to A dmin u sers a nd w hen th e optional I P Packet Processor ca rd is installed and enabled .

  • Page 270: Status | Traffic Statistics | Wan

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.4.4 Status | Traffic Statistics | WAN This p age a ppearance is d ependent o n w hether th e o ptional I P Packet Processor c ard i s not installed / installed but disabled or if it is installed and .

  • Page 271: Status | Traffic Statistics | Compression

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A For either page version, note the following: Clear Statistics / WAN Statistics Click [Clear] or [Clear Statistics] to clear all WAN statistics from the buffer. Click [Refresh] to update the page with the latest available statistics.

  • Page 272: Status | Traffic Statistics | Qos

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.4.6 Status | Traffic Statistics | QoS This nested page is accessible only to Admin users and when the optional IP Packet Processor card is installed and enabled . See Sect.

  • Page 273: Status | Traffic Statistics | Ptp

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.4.7 Status | Traffic Statistics | PTP Sect. K.7.3 PTP (Precision Time Protocol) (Appendix K. ETHERNET NETWORK CONFIGURATION) Use this page to obtain data intended to troubleshoot PTP operational issues.
  • Page 274 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A PTP Statistics Click [Refresh] to update the page with the latest available statistics. Click [Clear] to clear all PTP statistics from the buffer. This statistics table breaks down the number of PTP packets sent or received on the WAN and...

  • Page 275: Status | Traffic Statistics | Mac Table

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.4.8 Status | Traffic Statistics | MAC Table Use this page to view and refresh the MAC Addresses that the modem has discovered on one or more of its Ethernet switch ports.

  • Page 276: Status | Traffic Statistics | Clear Counters

    CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A 7.5.4.4.4.9 Status | Traffic Statistics | Clear Counters Use this page to clear and reset the counters for all Traffic Statistics pages (Ethernet, and when applicable, Router, Managed Switch, WAN, Compression, and QoS).

  • Page 277: Status | Performance Pages

    Click the Performance or Graphs tab to continue. 7.5.4.4.5.1 Status | Performance | Performance Use this page to view a tabulated “snapshot” of the CDM-625A performance statistics. Figure 7-45. Status | Performance | Performance page CPU Usage...

  • Page 278: Status | Performance | Graphs

    7.5.4.4.5.2 Status | Performance | Graphs Figure 7-46. Status | Performance | Graphs page Use this page to view a graphical representation of the CDM-625A performance. The displayed graphs automatically update in real time. Typical for both line graph types, the X-axis denotes elapsed time; the Y-axis denotes performance, in percent.

  • Page 279: Odu (Outdoor Unit) Pages (Summary Only)

    CSAT-5060 or KST-2000A/B Outdoor Unit that is connected via FSK to the CDM-625A. 2. The Comtech EF Data LPOD Amplifier / Block Up Converter is not supported by the CDM-625A Web Server (HTTP) Interface at this time. See Chapter 10. CDM-625A ODU (TRANSCEIVER, BUC, LNB) Operation for complete details on using the Web Server Interface for ODU operations.

  • Page 280: Redundancy Page

    Packet Processor Redundancy is supported in both 1:1 and 1:N redundant configurations using the CRS-500 M:N Redundancy System. Refer to the pertinent switch Installation and Operation Manuals for detailed information on using the CDM-625A in a redundancy configuration. Figure 7-48. Redundancy page Redundancy Config •...
  • Page 281 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A The Redundancy Traffic IP Address and subnet mask is different from the Traffic/Management IP Address and subnet mask that is defined on the Configuration | LAN | IP page (Sect. 7.5.4.3.2.1).
  • Page 282 CDM-625A Advanced Satellite Modem Revision 0 Ethernet-based Remote Product Management MN-CDM625A Notes: 7–80...

  • Page 283: Introduction

    Introduction The CDM-625A Advanced Satellite Modem serial remote product management interface is an electrical interface that is either an EIA-485 multi-drop bus (for the control of multiple devices) or an EIA-232 connection (for the control of a single device). The interface transmits data in asynchronous serial form, using ASCII characters.

  • Page 284: Eia-232

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A In the other direction, on the other pair each Target has a tri-state line driver connected, and the Controller has a line-receiver connected. All the line drivers are held in high-impedance mode until one (and only one) Target transmits back to the Controller. Each Target has a unique address, and each time the Controller transmits, the address of the intended recipient Target is included in a framed 'packet' of data.

  • Page 285: Packet Structure

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A All messages from Controller-to-Target require a response, with one exception: This will be either to return data that has been requested by the Controller, or to acknowledge reception of an instruction to change the configuration of the Target. The exception to this is when the Controller broadcasts a message (such as Set Time/Date) using Address 0, when the Target is set to EIA-485 mode.

  • Page 286: Start Of Packet

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.4.1.1 Start of Packet • Controller-to-Target: This is the character ‘<’ (ASCII code 60). • Target-to-Controller: This is the character ‘>’ (ASCII code 62). The ‘<’ and ‘>’ characters indicate the start of packet. They may not appear anywhere else within the body of the message.

  • Page 287: Instruction Code Qualifier

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.4.1.5 Instruction Code Qualifier This is a single character, which further qualifies the preceding instruction code. Code Qualifiers obey the following rules: 1. From Controller-to-Target, the only permitted values are:...

  • Page 288: Optional Message Arguments

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A If the Controller sends an instruction to set a parameter to a particular value, then, if the value sent is valid BUT the modulator will not permit that particular parameter to be c hanged at this time, the Target will acknowledge the message by replying, for example, with (ASCII code 42) TFQ* (with message arguments).

  • Page 289: Remote Commands And Queries

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Remote Commands and Queries 8.5.1 Table Indexes Notes: 1. Index Columns – Where Column ‘C’ = Command, and Column ‘Q’ = Query, columns marked ‘X’ designate the instruction code as Command only, Query only, or Command or Query.
  • Page 290 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Sect. 8.5.4 Unit Parameters CODE PAGE CODE PAGE CODE PAGE CODE PAGE CODE PAGE 8-30 8-38 8-29 8-27 8-32 8-38 8-33 8-27 8-34 8-35 8-29 8-36 8-28 8-38 8-29...
  • Page 291 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Sect. 8.5.8 BUC Parameters (L-Band Device) CODE PAGE CODE PAGE CODE PAGE CODE PAGE CODE PAGE 8-56 8-56 8-56 8-56 8-56 8-56 8-56 8-57 8-56 8-56 8-57 8-57 8-57 Sect.

  • Page 292: Tx Parameters

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.5.2 Tx Parameters Priority System: TIT (Highest priority) , TFM, TFT, TMD, TCR, TDR, and TSR (Lowest Priority), indicated by shading. Any change to a higher priority parameter can override any of the parameters of lower priority.
  • Page 293 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Tx FEC Type TFT= 1 byte, value of Command or Query.
  • Page 294 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Tx FEC Code TCR= 1 byte, value of Command or Query (Query only in IP-ACM).
  • Page 295 950 MHz to 2250 MHz (L-Band – FAST option) TFQ# Exception – Resolution=100Hz. Exception – 600 Emulation 600 Emulation: 8 bytes Note: The CDM-625A supports 70,140 MHz bands and L-Band. TFQ=xxx.xxxx Example: TFQ=0950.9872 Tx Sub-Mux TMX= 1 byte, 0 or 1 Command or Query. TMX?
  • Page 296 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) TDI= 1 byte, 0 or 1 Command or Query.
  • Page 297 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Tx Power Level TPL= 4 bytes Command or Query.
  • Page 298 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Power Level AUP= 1 byte, 0, 1, 2 or Command or Query.
  • Page 299 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Tx Power Level 3 bytes Query only.
  • Page 300 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Tx Ternary TTC= 1 byte, value of 0 Command or Query.

  • Page 301: Rx Parameters

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.5.3 Rx Parameters Priority System: RIT (Highest priority) , RFM, RFT, RMD, RCR, RDR, and RSR (Lowest Priority), indicated by shading. Any change to a higher priority parameter can override any of the parameters of lower priority.
  • Page 302 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Rx FEC Type RFT= 1 byte, value of 0 Command or Query.
  • Page 303 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Rx FEC Code RCR= 1 byte, value of Command or Query (Query only in IP-ACM).
  • Page 304 950 MHz to 2250 MHz (L-Band – FAST option) RFQ# Exception – Exception – Resolution=100Hz. 600 Emulation: 600 Emulation: Note: The CDM-625A supports 70,140 MHz bands and L-Band. 8 bytes RFQ=xxx.xxxx Example: RFQ=0950.9872 Rx Sub-Mux RMX= 1 byte, 0 or 1 Command or Query.
  • Page 305 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Rx Data Invert RDI= 1 byte, 0 or 1 Command or Query.
  • Page 306 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Rx Clock RCK= 1 byte, value of Command or Query.
  • Page 307 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Rx Ternary RTC= 1 byte, value of Command or Query.
  • Page 308 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Rx Terminal 10 bytes Query only. RTF? RTF=xxxxx.xxxx...

  • Page 309: Unit Parameters

    EMU=x Emulation or 2 The CDM-625A is designed to be a ‘drop-in’ replacement for the CDM-600 or CDM-600L modems. In order for complete EMU? (see Description of modem Emulation, all p arameters, i ncluding t he EID ( equipment I D) m ust be t hat of t he m odem i t i s em ulating. This...
  • Page 310 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) RTC Time TIM= 6 bytes Command or Query.
  • Page 311 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) SCP= 3 bytes, numeric Command or Query. (IBS and ESC++ feature)
  • Page 312 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Unit Test Mode TST= 1 byte, value of 0 Command or Query.
  • Page 313 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Retrieve next 5 80 bytes Query only.
  • Page 314 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Number of 3 bytes Query only. NUS?
  • Page 315 1 byte, 0 or 1 Command or Query. ODU= ODU? ODU=x Comms enable Enables or disables communications, via the FSK link, with a Comtech EF Data transceiver (ODU) in the form x, where: ODU? (see Description of 0=Disabled ODU* Arguments)
  • Page 316 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Traffic IP IPT= 18 bytes Command or Query.
  • Page 317 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) DoubleTalk CNM= 1 byte, value of 0 Command or Query.
  • Page 318 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) G.703 Clock CEX= 2 bytes Command or Query. (FAST option)
  • Page 319 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Rx BERT RBP= 1 byte Command or Query.
  • Page 320 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) ACM= 4 bytes Command or Query. ACM=...
  • Page 321 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Antenna AHD= 3 bytes Command or Query.

  • Page 322: Bulk Configuration Strings

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.5.5 Bulk Configuration Strings Note: In order to completely get/set the configuration of the modem, the following commands must be queried/set: • • OGC (L-Band Only) • Drop and Insert (specified in MGC): DNI (Open Network DNI);...
  • Page 323 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) …Global i=Rx Interface Type same as RIT...
  • Page 324 Notes: Much of the CDM-625A OGC f ormat h as be en kept s imilar t o t he C DM-600L O GC f ormat ( * i ndicates t he differences). In 600L Emulation Mode, OGC follows the CDM-600L’s OGC format.
  • Page 325 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Drop & Insert DNI= 51 bytes Command or Query. (D&I only)
  • Page 326 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Quad Drop & QDI= 73 bytes Command or Query.
  • Page 327 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Bulk Status Query 29 bytes Query only.

  • Page 328: Modem Information

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.5.6 Modem Information Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Hardware 4 bytes Query only.
  • Page 329 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Software 38 bytes Query only. SW2? SW2=x...
  • Page 330 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) ...Equipment ID 4=up to 5 Mbps (cont.)
  • Page 331 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Equipment ID X=Advanced QoS, where: (cont.) 0=Not installed...

  • Page 332: Modem Performance Information

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.5.7 Modem Performance Information Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Rx Signal Level 5 bytes Query Only.
  • Page 333 No_Comms = Indicates that a 1kHz signal has been detected, but that there is no (or not yet) a response for the modem; abcdef = The FLT? response information from the offline 600L unit; or abcdefghxx = The FLT? response information from the offline CDM-625A unit. Faults and 10 bytes Query only.
  • Page 334 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) …Faults and 8 = BUC no comms/bad checksum Status (cont.)
  • Page 335 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) …Faults and 4 = BUC no comms/bad checksum Status (cont.)
  • Page 336 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) CnC-APC Bit Error 4 bytes Query only.
  • Page 337 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) ...CnC-APC state 17 = Distant End ReBalance failed (cont.)

  • Page 338: Buc Parameters (L-Band Device)

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.5.8 BUC Parameters (L-Band Device) Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) BPS= 1 byte, value of Command or Query.
  • Page 339 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) 4 bytes Query only. BUT? BUT=sxxx Temperature BUCTemperature, in the form sxxx, where: Exception –...

  • Page 340: Lnb Parameters (L-Band Device)

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.5.9 LNB Parameters (L-Band Device) Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) LPS= 1 byte Command or Query.

  • Page 341: Ethernet Parameters

    CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A 8.5.10 Ethernet Parameters Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Ethernet Control SEC= 31 bytes Command or Query.
  • Page 342 Up to 347 Command or Query. EGC= EGC? EGC=1abccccdxxx;2ab Configuration bytes Global Configuration of CDM-625A Ethernet, in the form shown in the Response to Query column, where: EGC? EGC?n (where n = ccccdxxx;3abccccdxxx; EGC* 0 to 9. Returns the 4abccccdxxxDEFFGHI 1abccccdxxx;2abccccdxxx;3abccccdxxx;4abccccdxxx=Switch Ports configuration...
  • Page 343 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Packet PPE= 1 byte, value Command or Query.
  • Page 344 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Packet WMD= 1 byte, value 0 Command or Query.
  • Page 345 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction & Response to Query Type Arguments Command & Qualifier) Qualifier) Packet None Query only. VS0? VS0=x Processor Valid only when Packet Processor is installed and Enabled.
  • Page 346 CDM-625A Advanced Satellite Modem Revision 0 Serial-based Remote Product Management MN-CDM625A Notes: 8–64...

  • Page 347: Overview

    The Telnet Command Line Interface (referred to hereafter as the Telnet CLI or the CLI) is an Ethernet-based user menu system for the CDM-625A Advanced Satellite Modem equipped with an installed and enabled optional IP Packet Processor card. The CLI facilitates configuration, monitoring and control of the unit using a user-supplied terminal emulator (e.g., PuTTY or Tera...

  • Page 348: Terminal Emulator Considerations

    Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.1.2 Terminal Emulator Considerations 1. For best results, Comtech EF Data recommends PuTTY or TeraTerm as the preferred terminal emulators. 2. Use of the HyperTerminal terminal emulator is not supported or recommended. 3. The numeric keypad’s ENTER key may not work on some terminal emulators.
  • Page 349 Next, log in to the Telnet CLI using a valid Username and Password: The Telnet CLI Home menu should now be accessible: 1. In order to use the Telnet CLI to make configuration changes to the CDM-625A, Remote Access Mode should always be set to [Ethernet].

  • Page 350: Using The Tera Term Terminal Emulator

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.1.2.2 Using the Tera Term Terminal Emulator First, you must define your Telnet session connection: • Select TCP/IP; • For Host, enter the interface IP Address (e.g., 192.168.1.11);...
  • Page 351 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A Next, before you log in, Tera Term requires the following settings on the Setup > Terminal page: • For New-Line[Receive], use the drop-down list to select CR;...
  • Page 352 Telnet Command Line Interface (CLI) Operation MN-CDM625A The Telnet CLI Home menu should now be accessible: In order to use the Telnet CLI to make configuration changes to the CDM-625A, Remote Access Mode should always be set to [Ethernet]. 9–6...

  • Page 353: Using The Telnet Command Line Interface (Cli)

    The Telnet CLI allows monitoring, configuration, and control of the CDM-625A Satellite Modem in a manner similar to functionality provided via its front panel menus and the CDM-625A Web Server Interface. See those chapters for more in-depth explanations of operation.
  • Page 354 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A Note the following: Selection Description Press [ENTER] to accept any updates or changes made on this page – this does not [ENTER]Select save the selection to configuration memory, additional action is required.
  • Page 355 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 5. Any menu item that has been changed since the previous save gets appended with an asterisk [*], as “Cnc Mode“ shows in this example: You must press [F8] to save any changes to the modem memory. If you press [ESC] after changes have been made –...

  • Page 356: Command Line Interface Pages

    Access ODU comms, CSAT-5060 configuration submenus (summary Outdoor Unit (ODU) only) 9.3.7 Redundancy Access 1:1 or 1:N redundancy configuration submenu Enter alphanumeric Circuit ID; view read-only CDM-625A operations 9.3.8 General Information information screens Access Base Modem and Packet Processor stored events and 9.3.9...

  • Page 357: Home > Remote Access Mode

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.1.1 Home > Remote Access Mode In order to proceed with the operations described through the remaining chapter, you must be sure to set Remote Access Mode to [Ethernet] in order for configuration changes to be saved into memory.

  • Page 358: Home > Administration Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.2 Home > Administration Submenu Open the Administration submenu from the Home menu. This submenu contains the following options: Configuration Page Function Sect. 9.3.2.1 Host Access List Configure Host Access List(s) 9.3.2.2...

  • Page 359: Home > Administration > Host Access List

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.2.1 Home > Administration > Host Access List Open the scrollable Host Access List page from the Administration submenu. This page contains the following options: Dialog Window...

  • Page 360: Home > Administration > Snmp

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.2.2 Home > Administration > SNMP Open the SNMP page from the Administration submenu. This page contains the following options: Dialog Window Option Entry Contact Name Typical for each entry – Enter the desired designations Location Use the ↑↓...
  • Page 361 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.2.3 Home > Administration > Firmware (Base Modem) or (Packet Processor) Open the Base Modem and Packet Processor Firmware pages from the Administration submenu. Use these pages to view the current firmware information, or to select the alternate firmware image to be loaded at startup or reboot.

  • Page 362: Home > Administration > Reboot

    9.3.2.4 Home > Administration > Reboot Open the Reboot page from the Administration submenu. Use this page to perform a soft reboot of the CDM-625A. Otherwise, press [ESC] to return to the Administration submenu. Dialog Window Option Entry Use the ↑↓ arrow keys to select No (default) or Yes to reboot Force Reboot You must restart your Telnet CLI session upon reboot of the CDM-625A.

  • Page 363: Home > Administration > Fast

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.2.5 Home > Administration > FAST • Chapter 5. FAST ACTIVATION PROCEDURE • Sect. 6.2.8 SELECT: FAST Menus in Chapter 6. FRONT PANEL OPERATION Open the FAST Options page from the Administration submenu. Use this page to review your unit’s available and installed FAST features.
  • Page 364 Demo Mode Use the ↑↓ arrow keys to set Demo Mode as Disabled (default) or Enabled If Enabled, the CDM-625A begins operation in FAST Demo Mode – FAST Options Demo Mode allows access to ALL CDM-625A FAST options for 30 calendar days...

  • Page 365: Modem Configuration

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.2.6 Home > Administration > Save Modem Configuration / Load Modem Configuration Open the Save Modem Configuration and Load Modem Configuration pages from the Administration submenu. Use these pages to save and load up to 10 modem configurations.
  • Page 366 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A • Next, open the Save Modem Configuration window (Home > [A] Administration > [G] Save Modem Configuration). Note the Configuration slots listed in the window, and then press [A] Save to Slot.

  • Page 367: Home > Administration > Restore Factory Defaults

    9.3.2.7 Home > Administration > Restore Factory Defaults Open the Restore Factory Default page from the Administration submenu. Use this page to restore the CDM-625A settings to the original settings as shipped from the factory. Dialog Window Option Entry Use the ↑↓ arrow keys to set as Cancel (default) or Restore Restore Factory Defaults Press [A] to open the Restore Factory Defaults dialog window.

  • Page 368: Home > Modem Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3 Home > Modem Submenu Open the Modem submenu from the Home menu. This submenu contains the following options: Configuration Page Function Sect. Interface Configure the Tx and Rx Framing Modes 9.3.3.1...

  • Page 369: Home > Modem > Interface

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.1 Home > Modem > Interface Open the Interface page from the Modem submenu. This page contains the following options: Dialog Window Option Entry Typical for either entry – Use the ↑↓ arrow keys to select: Tx Interface Type •...

  • Page 370: Home > Modem > Modem Tx

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.2 Home > Modem > Modem TX Open the Modem TX page from the Modem submenu. This page contains the following options: Dialog Window Option Entry Tx FEC Type Use the ↑↓...
  • Page 371 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A Dialog Window Option Entry Enter a value as follows: Range 1 – From 50.0000 to 180.0000 MHz Tx Frequency • Range 2 – From 950.0000 to 2250.0000 MHz •...

  • Page 372: Home > Modem > Modem Rx

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.3 Home > Modem > Modem RX Open the Modem RX page from the Modem submenu. This page contains the following options: Dialog Window Option Entry Rx FEC Type Use the ↑↓...
  • Page 373 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A Dialog Window Option Entry Enter a value from 18.000 to 25000.000 Kbps Rx Data Rate Data Rate applies only when not in ACM Mode Enter a value from 18.000 to 25000.000 Ksps...

  • Page 374: Home > Modem > Carrier-In-Carrier (Cnc)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.4 Home > Modem > Carrier-in-Carrier (CnC) Chapter 10. D C) OPTION OUBLE ARRIER ARRIER Open the Carrier-in-Carrier (CnC) page from the Modem submenu. This page contains the...

  • Page 375: Home > Modem > Adaptive Coding And Modulation (Acm)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.5 Home > Modem > Adaptive Coding and Modulation (ACM) Appendix M. ADAPTIVE CODING MODULATION (ACM) OPTION Open the ACM page from the Modem submenu. Use this page as a quick reference guide for the Minimum and Maximum Tx ModCod settings.

  • Page 376: Home > Modem > Drop And Insert (D&I)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.6 Home > Modem > Drop and Insert (D&I) Appendix E. CLOCK MODES DROP INSERT (D&I) Open the Drop and Insert (D&I) page from the Modem page. This page contains the following...

  • Page 377: Home > Modem > Drop And Insert (D&I) > D&I Tables

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.6.1 Home > Modem > Drop and Insert (D&I) > D&I Tables From the Drop and Insert (D&I) page, press E (D&I Table), F (D&I++ Table ) or G D&I Quad Table to continue.
  • Page 378 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A The D&I++ Table dialog window shows the current value for the table. To edit the table value, press A, and then enter a new value*. Press [ENTER] to accept the change or [ESC] to return to the D&I dialog window.

  • Page 379: Home > Modem > Block Upconverter (Buc)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.7 Home > Modem > Block Upconverter (BUC) Open the Block Upconverter (BUC) page from the Modem submenu. This page features a read- only status section for the installed device and contains the following options:...

  • Page 380: Home > Modem > (Low-Noise Block Downconverter) Lnb

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.8 Home > Modem > (Low-Noise Block Downconverter) LNB Open the (Low-Noise Block Downconverter) LNB page from the Modem submenu. This page provides a read-only status section for the installed device and contains the following options:...

  • Page 381: Home > Modem > Meo (Medium-Earth Orbit)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.9 Home > Modem > MEO (Medium-Earth Orbit) MEO is non-functional when the optional Carrier-in-Carrier (CnC) card is installed. CDM-625 modems are configurable for continuous pairing as Primary and non-Primary Modems in an Antenna Handover System when the MEO (Medium Earth Orbit) feature is enabled.

  • Page 382: Home > Modem > Utilities

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.10 Home > Modem > Utilities Open the scrollable Utilities page from the Modem submenu. This page contains the following options: Dialog Window Option Entry Unit Test Mode Use the ↑↓...
  • Page 383 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A Dialog Window Option Entry Use the ↑↓ arrow keys to select Loop No Action, Loop RTS Controls Request To Send Tx Output, or Ignore RTS Assert CTS Use the ↑↓...

  • Page 384: Home > Modem > Overhead

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.3.11 Home > Modem > Overhead Open the scrollable Overhead page from the Modem submenu. This page contains the following options: Dialog Window Option Entry IDR Tx ESC Type Typical for either entry –...
  • Page 385 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A Dialog Window Option Entry Tx Backward Alarm Enable Port1 Tx Backward Alarm Enable Port2 Tx Backward Alarm Enable Port3 Tx Backward Alarm Enable Port4 Typical for each entry – Use the ↑↓ arrow keys to select Off or On...

  • Page 386: Home > Network Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4 Home > Network Submenu Open the Network submenu from the Home menu. This submenu contains the following options: Configuration Page Function Sect. Ethernet Ports Configure Ethernet Ports 1 through 4 9.3.4.1...

  • Page 387: Home > Network > Ethernet Ports

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.1 Home > Network > Ethernet Ports Open the scrollable Ethernet Ports page from the Network submenu. This page lists the current configuration settings for Ethernet Ports 1 through 4.

  • Page 388: Home > Network > Ethernet Ports > Ethernet Port

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.1.1 Home > Network > Ethernet Ports > Ethernet Port # Open the nested Ethernet Port 1 through Ethernet Port 4 pages from the scrollable Home >...

  • Page 389: Home > Network > Lan Ip

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.2 Home > Network > LAN IP Open the LAN IP page from the Network submenu. This page contains the following options: Dialog Window Option Entry 2048-byte Ethernet Frames Use the ↑↓...

  • Page 390: Home > Network > Lan Arp

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.3 Home > Network > LAN ARP Open the LAN ARP page from the Network submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select a table – see Sect. 9.3.4.3.1.

  • Page 391: Home > Network > Lan Arp > Arp Table > Arp Entry

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.3.1 Home > Network > LAN ARP > Arp Table > Arp Entry # Open the ARP Table from the nested ARP submenu. Use the ↑↓ arrow keys to scroll through the available entries.

  • Page 392: Home > Network > Vlan

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.4 Home > Network > VLAN Open the VLAN submenu from the Network submenu. This submenu contains the following options: Dialog Window Option Entry VLAN Table Use the ↑↓ arrow keys to select a table – see Sect. 9.3.4.3.1 VLAN Mode Enable Use the ↑↓...

  • Page 393: Home > Network > Vlan > Vlan Table > Vlan

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.4.1 Home > Network > VLAN > VLAN Table > VLAN # Open the VLAN Table from the nested VLAN submenu. Use the ↑↓ arrow keys to scroll through the available entries.

  • Page 394: Home > Network > Routes

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.5 Home > Network > Routes Open the Routes page from the Network submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select an index – see Sect. 9.3.4.5.1 Route Table Use the ↑↓...

  • Page 395: Home > Network > Routes > Route Table

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.5.1 Home > Network > Routes > Route Table Open the Route Table from the nested Routes submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Index 1>) and press [ENTER]...

  • Page 396: Home > Network > Managed Switch

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.6 Home > Network > Managed Switch Open the Managed Switch page from the Network submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select Disable, Layer 2 Only, or Layer...

  • Page 397: Home > Network > Igmp (Internet Group Management Protocol)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.7 Home > Network > IGMP (Internet Group Management Protocol) Open the IGMP page from the Network submenu. This page contains the following options: Dialog Window Option Entry Lists the IGMP Groups that are active on the modem.

  • Page 398: Home > Network > Dns (Domain Name System)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.8 Home > Network > DNS (Domain Name System) Open the DNS Caching page from the Network submenu. This page contains the following options: Dialog Window Option Entry DNS Caching Feature Use the ↑↓...

  • Page 399: Home > Network > Ptp (Precision Time Protocol)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.10 Home > Network > PTP (Precision Time Protocol) Open the PTP (Precision Time Protocol) page from the Network submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓...

  • Page 400: Home > Network > Sntp (Simple Network Time Protocol)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.11 Home > Network > SNTP (Simple Network Time Protocol) Open the Simple Network Time Protocol (SNTP) page from the Network submenu. This page contains the following options:...

  • Page 401: Home > Network > Mac Table

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.4.12 Home > Network > MAC Table Open the MAC Table page from the Network submenu. Use this page to review status information on the recognized MAC Addresses.

  • Page 402: Home > Wan Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.5 Home > WAN Submenu Open the WAN submenu from the Home menu. This submenu contains the following options: Configuration Page Function Sect. Configure Quality of Service operation...

  • Page 403: Home > Wan > Qos Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.5.1 Home > WAN > QoS Submenu Open the QoS (Quality of Service) submenu from the WAN submenu. The appearance of this page changes with the selected Advanced QoS mode (see Sect. 9.3.4.2 Home > Network > LAN IP).

  • Page 404: Home > Wan > Qos > Max-Pri / Min-Max Table

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.5.1.1 Home > WAN > QoS > Max-Pri / Min-Max Table Open the scrollable QoS Table (Max-Pri / Min-Max Table) from the QoS submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Index 1>) and press [ENTER] to view, in a standalone window, a specific set of statistics as...

  • Page 405: Home > Wan > Qos > Qos Differentiated Services Table

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.5.1.2 Home > WAN > QoS > QoS Differentiated Services Table Open the nested QoS Differentiated Services page from the QoS submenu. This page contains the following options:...

  • Page 406: Home > Wan > Compression

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.5.2 Home > WAN > Compression Open the Compression page from the WAN submenu. This page contains the following options: Dialog Window Option Entry Header Comp RTP Refresh Rate Typical for each entry –...

  • Page 407: Home >Wan > Encryption

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.5.3 Home >WAN > Encryption Open the Encryption page from the WAN submenu. This page contains the following options: Dialog Window Option Entry Allow Unencrypted Rx Use the ↑↓ arrow keys to select Drop or Allow Use the ↑↓...
  • Page 408 CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A Dialog Window Option Entry Encryption Key 6 Encryption Key 7 Encryption Key 8 Decryption Key 1 Decryption Key 2 Typical for each key entry – Enter a 32-character decryption code Decryption Key 3 Press a hot key to open a dialog window.

  • Page 409: Home > Outdoor Unit (Odu) Submenus (Summary Only)

    MN-CDM625A 9.3.6 Home > Outdoor Unit (ODU) Submenus (Summary Only) 1. After configuring the CDM-625A for 70/140 MHz operation, and then enabling ODU Comms, you may use the Telnet CLI ‘ODU (Outdoor Unit)’ submenus and pages to control and monitor a CSAT-5060 Outdoor Unit that is connected via FSK to the CDM-625A.

  • Page 410: Home > Redundancy Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.7 Home > Redundancy Submenu Open the Redundancy submenu from the Home menu. This submenu additionally displays the status of the redundant modem setup. The redundant modem operation options are as follows:...

  • Page 411: Home > General Information Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.8 Home > General Information Submenu Open the General Information submenu from the Home menu. This submenu contains the following options: Information Page Sect. Modem Status 9.3.8.1 Modem Information 9.3.8.2...

  • Page 412: Home > General Information > Modem Status

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.8.1 Home > General Information > Modem Status Press [ESC] to return to the General Information submenu. 9–66...

  • Page 413: Home > General Information > Modem Information

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.8.2 Home > General Information > Modem Information Open the Modem Information page from the General Information submenu. This page contains the following option: Dialog Window Option Entry...

  • Page 414: Home > General Information > Mac Table

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.8.3 Home > General Information > MAC Table Press [ESC] to return to the General Information submenu. 9–68...

  • Page 415: Home > General Information > Block Upconverter (Buc)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.8.4 Home > General Information > Block Upconverter (BUC) Press [ESC] to return to the General Information submenu. 9.3.8.5 Home > General Information > Low Noise Block Downconverter (LNB) Press [ESC] to return to the General Information submenu.

  • Page 416: Home > Logs Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.9 Home > Logs Submenu Open the Logs submenu from the Home menu. This submenu contains the following options: Dialog Window Sect. Base Modem 9.3.9.1 9.3.9.2 Packet Processor Press a hot key to access a submenu.

  • Page 417: Home > Logs > Base Modem

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.9.1 Home > Logs > Base Modem Open the Base Modem page from the Logs submenu. This page contains the following options: Dialog Window Option Entry Stored Event Table See Sect.

  • Page 418: Home > Logs > Base Modem > Stored Event Table

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.9.1.1 Home > Logs > Base Modem > Stored Event Table Open the scrollable Stored Event Table from the Base Modem page. Use the ↑↓ arrow keys to scroll through the available entries.

  • Page 419: Home > Logs > Base Modem > Stored Statistic Table

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.9.1.2 Home > Logs > Base Modem > Stored Statistic Table Open the scrollable Stored Statistic Table from the Base Modem page. Use the ↑↓ arrow keys to scroll through the available entries.

  • Page 420: Home > Logs > Packet Processor

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.9.2 Home > Logs > Packet Processor Open the Packet Processor page from the Logs submenu. This page contains the following options: Page / Dialog Window Description / Option Entry Stored Event Table See Sect.

  • Page 421: Home > Logs > Packet Processor > Stored Event Table

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.9.2.1 Home > Logs > Packet Processor > Stored Event Table Open the scrollable Stored Event Table from the Packet Processor page. Use the ↑↓ arrow keys to scroll through the available entries.

  • Page 422: Home > Statistics Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10 Home > Statistics Submenu The Telnet CLI Statistics submenu provides access to a number of read-only informational pages. Most page submenus provide a dialog window that affords you the option to reset (clear) the counters for that specific page.

  • Page 423: Home > Statistics > Ethernet Submenu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.1 Home > Statistics > Ethernet Submenu Open the nested Ethernet submenu from the Statistics submenu: Page / Dialog Window Description / Option Entry See Sect. 9.3.10.1.1 Rx Statistics See Sect.

  • Page 424: Home > Statistics > Ethernet > Rx

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.1.1 Home > Statistics > Ethernet > Rx Open the scrollable Rx statistics page from the nested Ethernet submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and...

  • Page 425: Home > Statistics > Ethernet > Tx

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.1.2 Home > Statistics > Ethernet > Tx Open the scrollable Tx statistics page from the nested Ethernet submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and...

  • Page 426: Home > Statistics > Ethernet > Errors

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.1.3 Home > Statistics > Ethernet > Errors Open the scrollable Error statistics page from the nested Ethernet submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and...

  • Page 427: Home > Statistics > Router

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.2 Home > Statistics > Router Open the Router statistics page from the Statistics submenu: Dialog Window Option Entry Router Clear Stats Use the ↑↓ arrow keys to select Cancel or Clear Press the hot key to open the dialog window.

  • Page 428: Home > Statistics > Managed Switch

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.3 Home > Statistics > Managed Switch Open the Managed Switch statistics page from the Statistics submenu: Dialog Window Option Entry Router Clear Stats Use the ↑↓ arrow keys to select Cancel or Clear Press the hot key to open the dialog window.

  • Page 429: Home > Statistics > Wan (Router Mode)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.4 Home > Statistics > WAN (Router Mode) Open the scrollable WAN (Router Mode) statistics page from the Statistics submenu. Otherwise, press [ESC] to return to the Statistics submenu.

  • Page 430: Home > Statistics > Wan (Managed Switch Mode)

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.5 Home > Statistics > WAN (Managed Switch Mode) Open the scrollable WAN (Managed Switch Mode) statistics page from the Statistics submenu: Dialog Window Option Entry Clear Stats Use the ↑↓...

  • Page 431: Home > Statistics > Compression

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.6 Home > Statistics > Compression Open the Compression statistics page from the Statistics submenu: Page / Dialog Window Option Entry / Description Compression Clear Counters Use the ↑↓ arrow keys to select Cancel or Clear See Sect.

  • Page 432: Home > Statistics > Compression > Table View

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.6.1 Home > Statistics > Compression > Table View Open the scrollable Compression statistics table from the nested Compression submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Route Index 1>) and press [ENTER] to view, in a standalone window, a specific set of...

  • Page 433: Home > Statistics > Qos

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.7 Home > Statistics > QoS Open the QoS statistics page from the Statistics submenu: Page / Dialog Window Option Entry / Description QoS Clear Counters Use the ↑↓ arrow keys to select Cancel or Clear View Statistics Table See Sect.

  • Page 434: Home > Statistics > Ptp

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.8 Home > Statistics > PTP Open the PTP statistics page from the Statistics submenu: Page Description LAN Details See Sect. 9.3.10.8.1 See Sect. 9.3.10.8.2 WAN Details Press a hot key to view a statistics page.

  • Page 435: Home > Statistics > Ptp > Lan Details

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.8.1 Home > Statistics > PTP > LAN Details Open the LAN Details statistics page from the PTP page. Otherwise, press [ESC] to return to the PTP page.

  • Page 436: Home > Statistics > Cpu

    CDM-625A Advanced Satellite Modem Revision 0 Telnet Command Line Interface (CLI) Operation MN-CDM625A 9.3.10.9 Home > Statistics > CPU Open the CPU statistics page from the Statistics submenu. Otherwise, press [ESC] to return to the Statistics submenu. 9.3.10.10 Home > Statistics > Clear All Counters...

  • Page 437: Introduction

    • KST-2000B (LNB) Ku-Band Satellite Transceiver Under L-Band operation, ODU refers to use of a Comtech EF Data LPOD Outdoor Amplifier / Block Up Converter (BUC), or an LNB (Low-Noise Block Down Converter). For either 70/140 MHz or L-Band operation, you can fully monitor and control ODU operations in the following ways: •...

  • Page 438: Odu Remote Control Address Setup

    10.2 ODU Remote Control Address Setup The ODU, as connected to a CDM-625A through FSK (Frequency Shift Keying), can be remotely monitored and controlled through the use of ODU commands and queries issued via serial remote control or with the Telnet Command Line Interface (CLI).

  • Page 439: Odu Operations Via The Cdm-625A Front Panel

    MN-CDM625A 10.3 ODU Operations via the CDM-625A Front Panel 1. The ODU menu branch is accessible from the CDM-625A front panel menu only • when the CDM-625A detects the presence of an installed ODU. 2. This appendix deals strictly with ODU operations. Chapter 6. FRONT PANEL OPERATION provides detailed information for any CDM-625A menu operations or selections not otherwise specified here.

  • Page 440: Cdm-625A Front Panel Menus – Odu Menu Hierarchy

    10.3.2 CDM-625A Front Panel Menus – ODU Menu Hierarchy Figure 10-2 identifies the CDM-625A front panel menu hierarchies allocated to the configuration, monitor, and control of a Comtech EF Data ODU. More specifically, menu branches that incorporate ODU operations are shown in bold; menu content that is dedicated to ODU operations is additionally italicized.

  • Page 441: Select: (Main) Menu Overview

    ODU) Menu Branches in this appendix. FAST 6.2.8 (Fully Accessible System Topology) Use to configure available options – e.g., extended data rates, interfaces, etc. Contact Comtech EF Data Product Support for details. From the top SELECT: menu, use the ◄ ►...

  • Page 442: Select: Configuration) Menu Branches

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.1 (SELECT: CONFIGURATION) Menu Branches CONFIG: Mode Clocks D&I/ACM EDMAC Misc Mask Remote () Use the ◄ ► arrow keys to select Tx, Rx, or Mask, and then press ENTER.
  • Page 443 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.1.2.1 CONFIG: Mask  BUC BUC alarm = Active (Active,Mask) Attach to Tx alarm = No (Yes,No)() When using L-Band, a Block Up Converter (BUC) may be included in the system. A ‘smart’ BUC may be monitored and/or controlled via the modem via FSK (Frequency-Shift Keying control).
  • Page 444 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.1.2.2 CONFIG: Mask  LNB LNB alarm = Active (Active,Mask) Attach to Rx alarm = No (Yes,No)() When using L-Band, a Low-Noise Block Down Converter (LNB) may be included in the system. It cannot be monitored and/or controlled by the modem, except for the power supply values.

  • Page 445: Select: Monitor) Live-Alarms Menu

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.2 (SELECT: MONITOR) Live-Alarms Menu Live Unit=None Net=None Alarms Rx=Demod Lock Tx=No Clock () Live BUC=None Alarms LNB=None () Six alarm types are provided across two screens. The last two alarm types (on the second screen) pertain to ODU operation as shown in the preceding examples.

  • Page 446: Select:) Odu Menu Branches

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.3 (SELECT:) ODU Menu Branches ODU: BUC:PwrSupply+Ref LNB:PwrSupply+Ref FSK-control () Use the ◄ ► arrow keys to select BUC:PwrSupply+Ref, LNB:PwrSupply+Ref, or FSK-control, and then press ENTER: ODU Menu Branch Sect.

  • Page 447: Odu: Buc:pwrsupply+Ref  Psumonitor

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.3.1.2 ODU: BUC:PwrSupply+Ref  LO Freq (Local Oscillator Frequency) BUC-LO Frequency= 00000 MHz Mix= High [-] (Hi,Lo) () Use the ◄ ► arrow keys to select BUC-LO (Local Oscillator) Frequency for the upconversion, or Mix to set the polarity for the upconversion mix in the BUC.

  • Page 448: Odu: Lnb:pwrsupply+Ref (Power Supply And Reference)

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.3.2 ODU: LNB:PwrSupply+Ref (Power Supply and Reference) LNB control/monitor: PSU-and-10MHz LO-freq PSUmonitor () The modem can supply DC power to an LNB connected to the Type ‘N’ rear panel Rx connector.

  • Page 449: Odu: Fsk-Control

    The appearance of the ODU: FSK-control screen adjusts automatically to the mode of operation: 70/140 MHz or L-Band. When the Tx frequency is 70/140 MHz – Communication with a Comtech EF Data CSAT or KST transceiver is achieved using a low-speed, half-duplex FSK link over the Rx IF port, with a carrier frequency around 2.7 MHz.
  • Page 450 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A To enable FSK, on the top line use the ◄ ► arrow keys to select FSK, and then use the ▲▼ arrow keys to set control as On.

  • Page 451: Odu: Fsk-Control  Csat

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.3.3.1 ODU: FSK-control  CSAT The CSAT menus that follow assume that you have already selected, and the system has identified, a (standalone) CSAT connected via the rear panel Rx IF port.
  • Page 452 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A Selection Setting Mute (Mute setting) Muted (i.e., Tx off) or Unmuted (i.e., Tx on) Slope Manual (0.0 to 1.0, in increments of 0.1) or Calibrated Press ENTER to save, or CLEAR to cancel and return to the previous menu.

  • Page 453: Misc

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A Selection Setting Summary or No-Summary. This controls whether or not an LNA Current- Window fault activates the Summary Fault Relay, and further permits you to Fault-Logic: select whether or not to switch the Online/Offline CSAT in the event of an LNA Current-Window fault.
  • Page 454 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor 10.3.3.3.3.1.2 Monitor: Misc Power-Supplies () ◄ ► To view these read-only displays, use the arrow keys to select Tx, Rx, Misc, or Power- Supplies, and then press ENTER.

  • Page 455: Alarms

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control  CSAT (2CSATs  CSAT #X)  10.3.3.3.3.1.3.1 Alarms Current-Alarms Current Status: Tx = OK Rx = OK Power-Supply = OK Misc = OK This screen is read-only. Press ENTER or CLEAR to return to the previous menu.

  • Page 456: Odu: Fsk-Control  Csat (2Csats  Csat #X)  Info

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info 10.3.3.3.3.1.4 Info: Model Misc () These read-only screens provide the ODU’s current configuration information without risking inadvertent changes.

  • Page 457: Odu: Fsk-Control  2Csats

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info  LNA Info: LNA:Off Fault-Logic:Summary Window:48% (EC) Use this screen to view the Low Noise Amplifier operational settings.
  • Page 458 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A • Waveguide Switch Tx and Rx status: OK or Ft (fault); • Redundancy Controller Box 5V and 12V values (to aid trouble-shooting system problems). To set Operating Mode, use the ◄...

  • Page 459: Odu: Fsk-Control  Kst

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.3.3.3 ODU: FSK-control  KST KST Select: Configuration Information Alarms () Use the ◄ ► arrow keys to select Configuration, Information, or Alarms, and then press ENTER.

  • Page 460: Odu: Fsk-Control  Kst  Information

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A Selection Setting This controls whether or not a HPA fault is indicated on t he Fault status, and ac tivates Fault-Logic the Summary Fault Relay. Select Summary or No-Summary.

  • Page 461: Current Status

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control  KST  Information  Misc 10.3.3.3.3.3.1.7 Info: HPA:Off Flt-Logic:No-Summ Band:B LNA:Off FLT-Logic:Summary This screen displays the HPA and LNA operational and fault logic summary settings.

  • Page 462: Odu: Fsk-Control  Buc

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A HPA: Comms:OK 9.75V:OK Over-Temp:OK Bias:OK -5V:OK Once any KST Alarms screen has been viewed, press ENTER or CLEAR to return to the previous menu. 10.3.3.3.3.4 ODU: FSK-control  BUC The menus that follow assume that you have selected and the system has identified a BUC connected via the Tx IF port.

  • Page 463: Configuration Settings

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control  BUC  Advanced-FSK  LPOD 10.3.3.3.3.4.3.1 (2LPODs  Online/Offline LPOD) LPOD S/N: 123456789 Cnfg Monitor Alarms Stats Info Redun () This submenu and its nested menus are identical in form and function for the...
  • Page 464 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs  Online/Offline LPOD) Cnfg  LNB LNB Current: Src=On SwitchBiasTee=Thru Window:30% Alarm=Disabled Cal=No() ◄ ► Use the arrow keys to select the setting to edit, and then use the arrow keys to edit ▲▼...
  • Page 465 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A Selection Setting (Auto Fault Recovery) This defines how a LPOD reacts to momentary fault conditions: • Disable – LPOD mutes when faulted and remain muted. • Enable – LPOD mutes when faulted, then unmutes once the fault goes away.
  • Page 466 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs  Online/Offline LPOD)  Monitor Misc Fan1Speed=100.0% Fan2Speed=100.0% LNB Current Draw=005.5mA ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs ...
  • Page 467 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A Once all events are compiled, the Stored-Events screen appears as shown here: Stored Events: Clear-All: No (No,Yes) #084 Info - PWR ON 10/12/10 12:52:08 On the top line – Use the ◄...
  • Page 468 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A Selection Setting Logging Enabled or Disabled. Interval The Loggi ng I nterval i s t he per iod of t ime ov er w hich per formance s tatistics ar e measured.
  • Page 469 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A • On/Off state for RF Amplifier mode • On/Off state for Mute mode • Online state (Online/Offline) • LNB current • BUC Tuning Voltage Press ENTER or CLEAR to return to the previous menu.
  • Page 470 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU: FSK-control BUC  Advanced-FSK  LPOD (2LPODs  Online/Offline LPOD) Information  LNB LNB Current: Src=On SwitchBiasTee=Off Window:30% Alarm=Disabled This screen displays the LNB Current information.

  • Page 471: Odu: Fsk-Control  Buc  Advanced-Fsk  2Lpods

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.3.3.3.3.4.3.1.7 ODU: FSK-control  BUC  Advanced-FSK  2LPODs The menus that follow assume that you have selected and the system has identified two LPODs connected via the Tx IF port.

  • Page 472: Odu Operations Via The Cdm-625A Web Server (Http) Interface

    Type the CDM-625A’s IP Address into the Address area of the user-supplied web browser, and then enter a valid User Name and Password is accepted. You will see the CDM-625A Web Server Interface “splash” page (Figure 10-3). Note that the Base Modem and Packet Processor Firmware Versions shown in this example are subject to change.

  • Page 473: Figure 10-4. Cdm-625A Web Server (Http) Interface Menu Tree (Fw Ver. 1.1.1)

    Tabs not specific to ODU operation appear dimmed and are explicitly defined in Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT. Click a navigation tab to continue. Pages marked with double asterisks (**) are operable only when BUCs or LNBs are installed. Figure 10-4. CDM-625A Web Server (HTTP) Interface Menu Tree (FW Ver. 1.1.1) 10–37...

  • Page 474: Web Page Descriptions

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.4.2 Web Page Descriptions 10.4.2.1 Configuration | BUC (Block Up Converter) Page When a Block Up Converter (BUC) is available, use this page to configure its operating settings and to view the BUC status for L-Band operation.

  • Page 475: Configuration | Lnb (Low Noise Block Down Converter)

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.4.2.2 Configuration | LNB (Low Noise Block Down Converter) When a Low Noise Block Down Converter (LNB) is available, use this page to configure its operating settings and to view the LNB status for L-Band operation.

  • Page 476: Status | Modem Logs | Base Modem Page

    CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.4.2.3 Status | Modem Logs | Base Modem Page Use this page to control how the CDM-625A processes ODU fault and alarm masking settings. Figure 10-7. Status | Modem Logs | Base Modem page Events Log •...
  • Page 477 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A Statistics Log • Read Next Five Statistics – Click to buffer the next group of five stored events into the scrollable statistics window. • Clear Statistics Log – Click to wipe clean the stored statistics log.

  • Page 478: Odu Pages

    ‘ODU | Config’, ‘ODU | Status’, and ‘ODU | Utilities’ pages is attempted, the following error message displays: When you configure the CDM-625A for L-Band operation, use the ‘ODU | Enable’ page to enable FSK operation for BUC products. Click the Enable, Config, Status, or Utilities tab to continue.

  • Page 479: Odu | Enable

    Use the drop-down list to select ODU operation as Disabled or Enabled, and then click [Submit]. If you encounter a communications issue – e.g., an ODU is either physically not present or the ODU Comms cable is not connected to the CDM-625A – the following error page displays after clicking [Submit]: Take steps to troubleshoot the ODU setup before attempting to enable ODU operations from this page.

  • Page 480: Odu | Config Pages

    10.4.2.4.2 ODU | Config Pages When you configure either the Comtech EF Data CSAT-5060 or KST-2000A/B as the ODU, you may use this page to configure operating settings specific to the active unit. Otherwise, when you attempt to access this page without first enabling ODU communications per the previous section, the following error page displays: 10.4.2.4.2.1 ODU | Config (CSAT-5060)
  • Page 481 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A ODU Selection If you use ODUs in redundancy, you may toggle this page between the Online and Offline units. Use the drop-down list to select CSAT #1 or CSAT #2, and then click [Select ODU]. A message in the right hand column of this section identifies which unit is ‘ONLINE’.
  • Page 482 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A LNA Parameters • Current Alarm Window – Enter a value of 20-50, or 99 to disable this feature. • Current Source – From the drop-down list, select Disable or Enable.

  • Page 483: Odu | Config (Kst-2000A/B)

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.4.2.4.2.2 ODU | Config (KST-2000A/B) Figure 10-10 shows the ‘ODU | Config’ page as it appears when you configure the Comtech EF Data KST-2000A/B as the ODU. Use this page to configure the primary ODU’s Transmit and Receive Parameters.
  • Page 484 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A • LNA Power Enable – From the drop-down list, select On or Off. • LNA Fault Logic – From the drop-down list, select Summary or No Summary.

  • Page 485: Odu | Status (Csat)

    CDM-625A. Use this page to review read-only status windows pertaining to the current operating condition for either the Comtech EF Data CSAT-5060 or the KST-2000A/B ODU. 10.4.2.4.3.1 ODU | Status (CSAT-5060) Figure 10-11 shows the ‘ODU | Status’ page as it appears when you configure the Comtech EF Data CSAT-5060 as the ODU.

  • Page 486: Odu | Status (Kst-2000A/B)

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.4.2.4.3.2 ODU | Status (KST-2000A/B) Figure 10-12 shows the read-only ‘ODU | Status’ page as it appears when you configure the Comtech EF Data KST-2000A/B as the ODU.

  • Page 487: Odu | Utilities (Csat)

    The appearance of the ‘ODU | Utilities’ page adjusts to the type of ODU that is configured for operation with the CDM-625A. Use this page to configure various ODU utility functions for either the Comtech EF Data CSAT-5060 or the KST-2000A/B ODU.
  • Page 488 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A Recalibrate LNA Current Click to recalibrate the LNA Current. Redundancy Box Mode Select Automatic or Manual, and then click [Submit]. ODU Date & Time • Enter a date in the form DD/MM/YY (where DD = day [01 to 31], MM = month [01 to 12], and YY = year [00 to 99]).

  • Page 489: Odu | Utilities (Kst-2000A/B)

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.4.2.4.4.2 ODU | Utilities (KST-2000A/B) Figure 10-14 shows the read-only ‘ODU | Utilities’ page as it appears when you configure the Comtech EF Data KST-2000A/B as the ODU.

  • Page 490: Odu Operations Via The Cdm-625A Telnet Command Line Interface (Cli)

    1. The CDM-625A Telnet Command Line Interface (CLI) is accessible only when the optional IP Packet Processor is installed and enabled . 2. The CDM-625A Telnet CLI uses Telnet TCP Port 107 . Be sure to specify this port when configuring your terminal emulator for CLI operation.

  • Page 491: Odu Operations Using The Telnet Cli

    10.5.1 ODU Operations using the Telnet CLI 1. ODU Comms must be Enabled, and the CDM-625A must be configured for 70/140 MHz operation in order to fully use the Telnet CLI ODU menus. 2. The Comtech EF Data KST-2000A/B Transceiver and LPOD Amplifier / Block Up Converter are not supported by the Telnet CLI at this time.

  • Page 492: Home > Outdoor Unit (Odu) Submenu

    MN-CDM625A 10.5.1.2 Home > Outdoor Unit (ODU) Submenu After configuring the CDM-625A for 70/140 MHz operation, you may use the ‘ODU (Outdoor Unit)’ pages to control and monitor the CSAT-5060 Outdoor Unit that is connected via FSK to the CDM-625A.

  • Page 493: Home > Outdoor Unit (Odu) > Csat-5060 Submenu

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.5.1.2.1 Home > Outdoor Unit (ODU) > CSAT-5060 Submenu Open the nested CSAT-5060 submenu from the Outdoor Unit (ODU) submenu. This submenu contains the following options: Dialog Window Option Entry Sect.
  • Page 494 10.5.1.2.1.1 Home > Outdoor Unit (ODU) > CSAT-5060 > Up Converter Settings 1/2, 2/2 After configuring the CDM-625A for L-Band operation, and when a Block Up Converter (BUC) is installed, you may use this page to configure BUC operating settings and to view the BUC operational status.
  • Page 495 10.5.1.2.1.2 Home > Outdoor Unit (ODU) > CSAT-5060 > Down Converter Settings 1/2, 2/2 After configuring the CDM-625A for L-Band operation, and when a Low Noise Block Down Converter (LNB) is installed, you may use this page to configure LNB operating settings and to view the LNB operational status.
  • Page 496 CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.5.1.2.1.3 Home > Outdoor Unit (ODU) > CSAT-5060 > Unit Settings 1/2, Open the Unit Settings 1/2 page or the Unit Settings 2/2 page from the nested CSAT-5060 submenu.

  • Page 497: Home > Outdoor Unit (Odu) > Csat-5060 > Lna Settings

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.5.1.2.1.4 Home > Outdoor Unit (ODU) > CSAT-5060 > LNA Settings Open the LNA Settings page from the nested CSAT-5060 submenu. This page contains the following options:...

  • Page 498: Home > Outdoor Unit (Odu) > Csat-5060 > Status

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.5.1.2.1.5 Home > Outdoor Unit (ODU) > CSAT-5060 > Status Open the read-only Status page from the nested CSAT-5060 submenu. This page provides the following information: Item...

  • Page 499: Home > Outdoor Unit (Odu) > Csat-5060 > Logs

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.5.1.2.1.6 Home > Outdoor Unit (ODU) > CSAT-5060 > Logs Open the Logs page from the nested CSAT-5060 submenu. This page contains the following options: Dialog Window...

  • Page 500: Home > Outdoor Unit (Odu) > Csat-5060 > Redundancy

    CDM-625A Advanced Satellite Modem Revision 0 CDM-625A ODU (Transceiver, BUC, LNB) Operation MN-CDM625A 10.5.1.2.1.7 Home > Outdoor Unit (ODU) > CSAT-5060 > Redundancy Open the Redundancy page from the nested CSAT-5060 submenu. Redundant ODU configuration options are as follows: Dialog Window...
  • Page 501 A.1 Overview The EIA-530 standard pinout, provided on the CDM-625A, is becoming more popular in many applications. However, there are still many occasions – especially for existing EIA-422/449 and V.35 users – when a conversion is required. For these situations: •...
  • Page 502 Appendix A MN-CDM625A A.1.1 EIA-530 to RS-422/449 DCE Conversion Cable Use the EIA-530 to RS-422/449 DCE Conversion Cable (Figure A-1) for connections between the CDM-625A and the user data. Figure A-1. EIA-530 to RS-422/449 DCE Conversion Cable (CEFD P/N CA/WR0049)
  • Page 503 CDM-625A Advanced Satellite Modem Revision 0 Appendix A MN-CDM625A A.1.2 EIA-530 to V.35 DCE Conversion Cable Use the EIA-530 to V.35 DCE Conversion Cable (Figure A-2) for connections between the CDM-625A and the user data. Figure A-2. EIA-530 to V.35 DCE Conversion Cable...
  • Page 504 The RS-232 Remote Control Cable (Figure A-3) is required for firmware updates in the absence of an Ethernet-based connection. It is also used for serial-based M&C of the CDM-625A. Connect this cable from the CDM-625A Rear Panel Remote Control port to any user PC serial port.
  • Page 505 Appendix B. FEC (FORWARD ERROR CORRECTION) OPTIONS Introduction As standard, the CDM-625A Advanced Satellite Modem is equipped with four Forward Error Correction encoders/decoders – Viterbi, Sequential, concatenated Reed-Solomon and Trellis (which is available with the 8-PSK FAST option). The constraint lengths and encoding polynomials are not only Open Network compatible, but are also Closed Network compatible with the vast majority of existing modems from other manufacturers.

  • Page 506: Table B-1. Viterbi Decoding Summary

    (i.e., does not fail rapidly below a certain value of Eb/No). Note that, in BPSK mode, the CDM-625A only permits a coding rate of 1/2. Because the method of convolutional coding used with Viterbi, the encoder does not preserve the original data intact, and is called non-systematic.

  • Page 507: Table B-2. Sequential Decoding Summary

    RS decoder do not exceed its capacity to correct those errors. In the case of the CDM-625A, different RS code rates are used according to the mode of operation: Closed Network Modes and Open Network Modes.

  • Page 508: Table B-3. Concatenated Rs Coding Summary

    This may be due to the carrier-recovery circuits, or the synchronization threshold of the primary FEC device, or both. In the CDM-625A, and Rate 1/2 operation, this threshold is around 4 dB Eb/No. Below this value, operation is not possible, but above this value, the error performance of the concatenated RS system produces exceptionally low error rates for a very small increase in Eb/No.

  • Page 509: Table B-4. 8-Psk/Tcm Coding Summary

    – the natural consequences of the higher-order modulation. The CDM-625A fully implements the IESS-310 specification at data rates up to 20 Mbps. In accordance with the specification, the RS outer code can be disabled. Performance curves for both cases are shown in the following figures.

  • Page 510: Introduction

    CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A TPC and Low Density Parity Check (LDPC) coding B.7.1 Introduction In the past few years there has been an unprecedented resurgence in interest in Forward Error Correction (FEC) technology. The start of this new interest has its origins in the work done by Claude Berrou et al, and the 1993 landmark paper, Near Shannon Limit Error Correcting Coding and Decoding –...
  • Page 511 Eb/No than 8-PSK. Comtech’s implementation of 8-QAM is the subject of a U.S. Patent, granted in 2007. Comtech EF Data chose the CDM-600 platform as the first satellite modem in which to implement both LDPC and 8-QAM, and the CDM-625A includes a newer technology version of the original design.

  • Page 512: Table B-5. Available Tpc/ Ldpc Modes

    MN-CDM625A In order to meet this requirement, Comtech EF Data has developed a combination LDPC/TPC Codec module that can be added to the CDM-625A Modem. Table B-5 outlines the operating modes provided by this module. Table B-5. Available TPC/ LDPC Modes...

  • Page 513: Table B-6. Comparison Of All Comtech Ef Data Tpc/Ldpc Modes (Cdm-625A With Tpc/Ldpc Codec

    * The occupied bandwidth is defined at the width of the transmitted spectrum taken at the –10 dB points on t he plot of power spectral density. This equates to 1.19 x symbol rate for the CDM-625A transmit filtering. ** Included for comparative purposes...

  • Page 514: Table B-7. Tpc/Ldpc Processing Delay Comparison

    In many cases, FEC methods that provide increased coding gain do so at the expense of increased processing delay. However, with TPC, this increase in delay is very modest. Table B-7 shows, for the CDM-625A, the processing delays for the major FEC types, including the three TPC modes.

  • Page 515: Table B-9. The Versafec Modcod Set

    CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A VersaFEC (Short-block LDPC) VersaFEC is a system of short-block LDPC codes that have been designed as a low-latency alternative to both Comtech’s existing LDPC codes, and to the system set forth in the DVB-S2 specification (EN 302307) ratified by ETSI.
  • Page 516 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A The performance of the VersaFEC codes compared with the Shannon bound is shown in Figure B-2. This puts the performance of VersaFEC at or near the DVB-S2 performance with 16 kbit blocks.
  • Page 517 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A B.8.1 VersaFEC Extensions B.8.1.1 Extended CCM Codes Two additional rates are available with the VersaFEC family of codes. Note that these are CCM (Constant Coding and Modulation) only – they are NOT included in the ACM set of ModCods.
  • Page 518 There are occasions where a user may wish to operate a satellite link with no forward error correction of any kind. For this reason, the CDM-625A offers this uncoded mode for three modulation types – BPSK, QPSK, and OQPSK. However, the user should be aware of some of the implications of using this approach.
  • Page 519 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A The second problem inherent in PSK demodulators is that of ‘data false locking’. In order to accomplish the task of carrier recovery, the demodulator must use a non-linear process. A second-order non-linearity is used for BPSK, and a fourth-order non-linearity is used for QPSK.
  • Page 520 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No i n dB 1E-1 Uncoded BPSK/QPSK Viterbi Decoding 1E-2 Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification limit, Rate 7/8 1E-7 Coding 1E-8 Specification Specification limit Rate 1/2 limit, Rate 3/4...
  • Page 521 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Uncoded BPSK/QPSK Viterbi with concatenated 1E-2 RS 220,200 Outer Code Sync threshold, Rate 3/4 1E-3 Sync threshold, Rate 7/8 1E-4 Combined sync 1E-5 threshold, demod and Viterbi...
  • Page 522 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 8-PSK/TCM Rate 2/3 Uncoded BPSK/QPSK Decoding, with and without 219, 201 RS 1E-2 Outer Code 1E-3 1E-4 Typical Performance 1E-5 1E-6 1E-7 1E-8 Specification limit Specification Rate 2/3 Coding and...
  • Page 523 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No i n dB 1E-1 16-QAM Viterbi, Rate 3/4 and Rate 7/8 with 220,200 RS Outer Code Uncoded BPSK/QPSK 1E-2 Uncoded 16-QAM 1E-3 1E-4 Specification limit Rate 7/8 Viterbi and 220,200 RS...

  • Page 524: Sequential Decoding

    CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Sequential Decoding Uncoded BPSK/QPSK 64 kbps, BPSK, QPSK and OQPSK 1E-2 Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification limit, Rate 7/8 Coding, QPSK, OQPSK 1E-7 Specification limit,...
  • Page 525 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Sequential Decoding Uncoded BPSK/QPSK 2048 kbps, QPSK, OQPSK 1E-2 Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification limit, Rate 7/8 Coding QPSK, OQPSK 1E-7 Specification limit, Rate 3/4 Coding...
  • Page 526 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Sequential with Uncoded BPSK/QPSK concatenated RS 220,200 Outer Code, 512 kbps 1E-2 BPSK, QPSK, OQPSK Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification Limit Rate 3/4 and 220,200 Outer Code...
  • Page 527 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech Turbo Product Codec Rate 5/16 BPSK Uncoded BPSK/QPSK 1E-2 1E-3 Spec limit Rate 5/16 BPSK 1E-4 1E-5 1E-6 1E-7 1E-8 Typical performance 1E-9 Figure B-10. Turbo Product Code Rate 5/16 BPSK...
  • Page 528 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech Turbo Product Codec Rate 21/44 BPSK/QPSK/OQPSK Uncoded BPSK/QPSK 1E-2 Notes: * Rate 21/44 QPSK is shown as R1/2 on the front panel 1E-3 * The OQPSK acquisition...
  • Page 529 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech Turbo Product Codec Rate 3/4 QPSK/OQPSK, Uncoded BPSK/QPSK 8-PSK/8-QAM and 16-QAM 1E-2 Uncoded 16-QAM Spec limit - Uncoded Spec limit Rate 3/4 8-PSK Rate 3/4 QPSK/OQPSK...
  • Page 530 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech Turbo Product Codec Rate 7/8 QPSK/OQPSK, Uncoded BPSK/QPSK 8-PSK/8-QAM and 16-QAM 1E-2 Uncoded Uncoded 16-QAM Spec limit - 8-PSK Rate 7/8 QPSK/OQPSK 1E-3 Spec limit Rate 7/8...
  • Page 531 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech Turbo Product Codec Uncoded Rate 0.95 QPSK/OQPSK BPSK/QPSK and 8-PSK/8-QAM 1E-2 Spec limit Rate 0.95 QPSK/OQPSK 1E-3 Uncoded 8-PSK 1E-4 1E-5 1E-6 1E-7 Spec limit Rate 0.95...
  • Page 532 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech LDPC Codec Rate 1/2 BPSK/QPSK/OQPSK Uncoded BPSK/QPSK 1E-2 Note: The OQPSK demod acquisition and tracking 1E-3 threshold is about 1 dB worse than the QPSK Spec limit...
  • Page 533 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech LDPC Uncoded Rate 2/3 QPSK/OQPSK BPSK/QPSK and 8-PSK/8-QAM 1E-2 1E-3 Spec limit Spec limit Rate 2/3 Rate 2/3 Uncoded QPSK/OQPSK 8-QAM 8-PSK 1E-4 1E-5 1E-6 Spec limit...
  • Page 534 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech LDPC Uncoded Rate 3/4 QPSK/OQPSK BPSK/QPSK 8-PSK/8-QAM and 16-QAM 1E-2 1E-3 Spec limit Spec limit Rate 3/4 Rate 3/4 8-PSK Uncoded QPSK/OQPSK 8-QAM 8-PSK 1E-4 1E-5...
  • Page 535 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.488 BPSK Uncoded BPSK/QPSK 1E-2 1E-3 Rate 0.488 BPSK 1E-4 Typical performance shown - guaranteed performance curve is 0.3 dB to the right...
  • Page 536 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.533, 0.631, 0.706, Uncoded BPSK/QPSK and 0.803 QPSK 1E-2 Rate Rate Rate Rate 1E-3 0.533 0.631 0.706 0.803 QPSK QPSK QPSK QPSK 1E-4...
  • Page 537 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.642, 0.711, 0.780 Uncoded BPSK/QPSK 8-QAM 1E-2 Rate Rate Rate 0.642 0.711 0.780 8-QAM 8-QAM 8-QAM 1E-3 Uncoded 8-PSK 1E-4 1E-5 1E-6 1E-7...
  • Page 538 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.731, 0.780, 0.829 and 0.853 16-QAM Uncoded BPSK/QPSK 1E-2 Uncoded 16-QAM Rate Rate Rate Rate 0.780 0.731 0.829 0.853 16-QAM 16-QAM 16-QAM 16-QAM...
  • Page 539 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech VersaFEC® Codec - Extended CCM Uncoded BPSK/QPSK 0.576 8-QAM and 1E-2 0.644 16-QAM Rate Rate 0.576 0.644 1E-3 8-QAM 16-QAM Uncoded 8-PSK 1E-4 1E-5 1E-6 1E-7...
  • Page 540 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No in dB 1E-1 Comtech Ultra-Low-Latency (ULL) Codec - Rate 0.493 Uncoded BPSK/QPSK BPSK/QPSK, 1E-2 0.654 and 0.734 QPSK Rate Rate Rate 1E-3 0.654 0.493 0.734 QPSK BPSK/QPSK QPSK 1E-4 Typical performance shown - guaranteed performance curves are 0.3 dB to the right...
  • Page 541 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Eb/No i n dB 1E-1 Differential Encoding - No FEC, no Uncoded BPSK/QPSK 1E-2 scrambling 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 Figure B-24. Differential Encoding – No FEC, No Scrambling...
  • Page 542 CDM-625A Advanced Satellite Modem Revision 0 Appendix B MN-CDM625A Notes: B–38...
  • Page 543 Appendix C. AUPC (AUTOMATIC UPLINK POWER CONTROL) Introduction You MUST obtain permission from the Satellite Operator to use this feature. Improper use of this feature could result in a transmitting terminal seriously exceeding its allocated flux density on the Operator’s satellite. This could produce interference to other carriers, and could cause transponder saturation problems.
  • Page 544 CDM-625A Advanced Satellite Modem Revision 0 Appendix C MN-CDM625A Setting AUPC Parameters The important consideration is that EDMAC framing should be enabled. 1) Use the SELECT: Configuration  Mode menu to first select EDMAC framing. You may select EDMAC as IDLE, or define the unit as an EDMAC Master or Slave.
  • Page 545 CDM-625A Advanced Satellite Modem Revision 0 Appendix C MN-CDM625A C.2.3 Alarm This defines modem behavior if the maximum power limit is reached while under AUPC control. The two choices are: • NONE (no action) – default setting. • Tx ALARM (generate a Tx alarm).
  • Page 546 Appendix C MN-CDM625A Monitoring Comtech EF Data strongly cautions against the use of large values of permitted power level increase under AUPC control. Users should consider using the absolute minimum range necessary to improve rain-fade margin. The remote demodulator’s value of Eb/No can be monitored at all times, either from the front panel (SELECT: Monitor ...
  • Page 547 MetaCarrier® spread spectrum technology to embed a unique carrier identification sequence for the transmitted carrier. The CDM-625A with MetaCarrier® provides a subset of the functionality of the Comtech EF Data MCED-100 MetaCarrier® Embedding Device. It is used in tandem with the Comtech EF Data MCDD-100 MetaCarrier®...
  • Page 548 MetaCarrier. The CDM-625A creates a composite carrier by first sizing the appropriate MetaCarrier, and then by adding the spread spectrum CID (with power spectral density approximately 22 dB below the transmission carrier’s spectral power density) to the transmission carrier.
  • Page 549 MetaCarrier that may cause the stated times to be longer: Therefore, the time for the CDM-625A with MetaCarrier to insert a complete CID ID sequence is as follows. Note that the time for unique ID may be shorter than shown, since upon achieving lock to the MetaCarrier, the unique ID is made available immediately since MetaCarrier lock requires the reception of three full packets to declare lock.
  • Page 550 REMOTE CONTROL INTERFACE, AND THE ETHERNET-BASED SNMP INTERFACE ARE RECOMMENDED ONLY FOR ADVANCED USERS. COMTECH EF DATA STRONGLY ENCOURAGES USE OF THE CDM-625A FRONT PANEL OR WEB SERVER (HTTP) INTERFACE FOR MONITOR AND CONTROL (M&C) OF THE CDM-625A. D.4.1 Enabling Carrier ID Operation D.4.1.1 Enabling Operation via the CDM-625A Front Panel and VFD...
  • Page 551 D.4.2 Creating the MetaCarrier Custom Message It is IMPORTANT to understand that Carrier ID and Circuit ID, while named similarly, are two distinct features of the CDM-625A. Read your documentation carefully. D.4.2.1 Creating the Message via the CDM-625A Front Panel and VFD Sect.
  • Page 552 CDM-625A Advanced Satellite Modem Revision 0 Appendix D MN-CDM625A D.4.2.2 Creating the Message via the CDM-625A Web Server (HTTP) Interface Sect. 7.5.4.3.7 Configuration | Utilities (Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT) After logging in to the CDM-625A Web Server (HTTP)

  • Page 553: Transmit Clocking

    DTE also returns the clock (Terminal Timing, or TT) – the modem can accept it if it is present, but uses ST if it is not. At rates above 2 Mbps, Comtech EF Data highly recommends that you return TT to ensure the correct clock/data relationship.

  • Page 554: Tx Terrestrial

    Sect. 9.2.2 in that, in this mode, the signal appearing on TT is used to provide the timing reference for the transmit side of the CDM-625A. However, in this mode the ST pins on the interface are active and provide a copy of the RX Satellite clock (i.e., the clock from the demodulator, prior to the buffer).
  • Page 555 CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A • No framing (EDMAC, etc.) may be used. • No RS coding may be used. • RS-422, V.35, HSSI, and LVDS are the only interfaces supported and used on the Type ‘D’...

  • Page 556: Receive Clocking

    MN-CDM625A Receive Clocking There are three receive clocking modes in the CDM-625A: Buffer Disabled (RX Satellite), Buffer Enabled (TX=RX), and Buffer Enabled (RX< >TX). An additional setting used only for Drop and Insert is described in further detail later in this chapter. Figure E-2 provides a graphic depiction of these modes.
  • Page 557 CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A Figure E-2. RX Clock Modes E–5...
  • Page 558 CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A X.21 Notes The central feature of X.21 is that the DCE supplies the clock for both directions. Therefore, the first requirement is that TX and RX data rates are the same. Because the DCE doesn’t get an input clock moving in the same direction as its input data, the several nanoseconds of delay through long cables and the modem’s data transceivers can cause the clock phase to change...

  • Page 559: Frame Formats

    CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A Frame Formats Figure E-3 shows the supported E1 and T1 Frame Formats. Note that, for D&I++, the smaller overhead frame structure does not support CAS signaling, although E1 timeslot 16 may still be one of the channels transmitted.

  • Page 560: Timeslot Selection

    CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A Timeslot Selection Selection of the transmit and receive data rates may be made in certain 64 kbps increments and may be independent of each other. The actual satellite rates for open network D&I are 16/15 of...
  • Page 561 Appendix E MN-CDM625A Drop and Insert (D&I) Clocking Figure E-4 shows the general arrangement for Drop and Insert clocking in the CDM-625A. Note that there are two inputs and two outputs shown for Drop and Insert Operation: Drop Data In (DDI)
  • Page 562 CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A RX Buffer Clock = Insert (D&I only) The E1 or T1 clock recovery from the IDI G.703 port serves as the RX Buffer reference. In addition, the recovered data is the E1/T1 input to the Insert Mux. If the RX G.703 recovery circuit detects no activity at IDI input, or cannot detect the expected frame format, Buffer Clock = RX Satellite will be chosen as a fall-back.
  • Page 563 G.703 synchronizing signal. However, with the G.703 clock extension mode this may become unnecessary, as the CDM-625A – operating at either end of the link, where the local modem has access to a high-stability G.703 signal – can provide an almost perfect copy of this signal at the distant end.
  • Page 564 CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A emphasized that the synthesis is exact. The net result is that the E1 or T1 timing signal used at the local end is reproduced at the distant end, regardless of the link data rate.
  • Page 565 CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A CDM-625A CDM-625A Figure E-7. G.703 Clock Extension Mode 1 E–13...
  • Page 566 CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A CDM-625A CDM-625A Figure E-8. G.703 Clock Extension Mode 2 E–14...
  • Page 567 CDM-625A Advanced Satellite Modem Revision 0 Appendix E MN-CDM625A CDM-625A CDM-625A Figure E-9. G.703 Clock Extension Mode 3 E–15...
  • Page 568 Up to four complete or fractional E1 streams may be concatenated into a single Comtech proprietary satellite frame structure using the Quad E1 feature. The “Balanced G.703” and “Aux G.703” 9-pin D-sub female connectors on the CDM-625A rear panel each provide access to two ports. See Sect. 3.2.2.2 G.703 Connectors for pinout details.

  • Page 569: Introduction

    Comtech EF Data has added a new dimension to satellite communication optimization: DoubleTalk Carrier-in-Carrier. What is DoubleTalk Carrier-in-Carrier? The CDM-625A’s DoubleTalk Carrier-in-Carrier (CnC) option uses a patented signal processing...

  • Page 570: Application Requirements

    • Link must be full duplex. • A CDM-625A must be used at the end of the link where the cancellation needs to take place. • The transponder is operated as Loopback. That is, each end of the link must be able to see a copy of its own signal in the return (downlink) path from the satellite.
  • Page 571 2) Frequency offset and drift: Common sources are satellite Doppler shift, up and down converter frequency uncertainties, and other drift associated with the electronics in the CDM-625A itself. The CnC module tracks and compensates for this frequency offset and drift.

  • Page 572: Operational Recommendations

    CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A both deterministic (static) or random (and time varying). An example of the former would be the differences resulting from antenna size/gain variations between the two ends of the link. An example of the latter would be transient power differences due to different levels of atmospheric fading in the uplinks.
  • Page 573 The transponder downlinks the composite signal containing both carriers on the same band to the CDM-625A which then translates the signal to near baseband where it can be filtered (decimated) and then processed as a complex envelope signal. The CDM-625A then suppresses the version of the near end carrier on the downlink side and then passes the desired carrier to the demodulator for normal processing.
  • Page 574 Figure F-3. Same Link Using CDM-625A and DoubleTalk Carrier-in-Carrier Figure F-4. Duplex Link Optimization The CDM-625A CnC module operates on the near-zero signal before the demodulator, and is waveform agnostic. This means that no prior knowledge of the underlying modulation, FEC, or any other waveform specific parameter is required in order to perform the signal suppression operation.

  • Page 575: Table F-1. Spectral Efficiency Using Doubletalk Carrier-In-Carrier

    CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A must be kept in mind when troubleshooting a system that utilizes the DoubleTalk Carrier-in- Carrier technique for signal suppression. One possible way to mitigate false peaks is to narrow the correlation window. For example, if the delay is known to be around 240ms, set the minimum search delay to 230ms and the maximum search delay to 250ms.
  • Page 576 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A to interference originating from its local modulator. However since this interference is produced locally, it is possible to estimate and remove its influence prior to demodulation of the data transmitted from the remote location.
  • Page 577 Eb/No. To compensate for the residual noise, a small amount of additional link margin is required to maintain the BER. Margin requirements depend on the product, modulation and power ratios: For the CDM-625A, the additional margin requirements are as follows: Modulation Nominal Margin* BPSK 0.3 dB...
  • Page 578 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A F.4.5.1 Symmetric Data Rate Link Consider the following example: Satellite & Transponder Galaxy 18 @ 123º W, 13K/13K Earth Station 1 Phoenix, AZ – 4.6 m Earth Station 2 Phoenix, AZ – 2.4 m...
  • Page 579 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A Link parameters and LST summary for QPSK, LDPC 2/3 with Carrier-in-Carrier is as follows: F–11...
  • Page 580 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A The link budget summary for the different ModCod combinations is as follows: Allocated Leased BW Savings Compared S. No. Modulation & FEC PEB (MHz) Ratio BW (MHz) (MHz) to Original (dB) 8-QAM, LDPC 2/3 0.3584...
  • Page 581 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A The savings summary is as follows: Original Link With Carrier-in-Carrier and LDPC Item Savings Hub to Remote to Hub to Remote to Total Total Remote Remote Data Rate (kbps) 3000 1000...
  • Page 582 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A To continue, consider this example: Satellite & Transponder IS-901 @ 342º W, 22/22 (EH/EH) Earth Station 1 Africa – 9.2 m Earth Station 2 Africa – 4.5 m Data Rate 2.048 Mbps / 2.048 Mbps Whereas the original link used 8-PSK TPC 3/4, the Carrier-in-Carrier link used QPSK VersaFEC 0.803.
  • Page 583 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A F.4.5.4 Carrier-in-Carrier Commissioning and Deployment Prior to commissioning a Carrier-in-Carrier link, it is critical that the link is fully tested in non Carrier-in-Carrier mode and all system issues including external interference, antenna pointing, cabling, SSPA backoff are resolved.
  • Page 584 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A F.4.6 Validating Carrier-in-Carrier Performance Carrier-in-Carrier performance can be easily validated by verifying that Eb/No degradation due to Carrier-in-Carrier is within published specification for the observed Power Spectral Density Ratio. The following steps are recommended for validating Carrier-in-Carrier performance:...
  • Page 585 Task Calculate the link budget for both carriers in the duplex link, with required CnC margin: Verify that the PDS ration is within spec for the CDM-625A. Calculate the Allocated Bandwidth (BW) and Power Equivalent Bandwidth (PEB) for the duplex...
  • Page 586 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A F.5.2 Estimating PSD Ratio PSD can be estimated from a link budget using Downlink EIRP and Symbol Rate: PSD = Downlink EIRP – 10 * Log (Symbol Rate) PSD Ratio Example:...
  • Page 587 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A F.5.2.2 Estimating PSD Ratio from Satmaster F.5.2.3 Estimating PSD Ratio Using Spectrum Analyzer PSD Ratio or CnC Ratio can also be estimated using a Spectrum Analyzer capable of integrating the signal power in a given bandwidth.
  • Page 588 Carrier-in-Carrier Automatic Power Control (CnC-APC) F.6.1 Introduction A number of Comtech EF Data modems, including the CDM-625A, offer Automatic Uplink Power Control (AUPC) to mitigate the effects of rain fading and other link impairments. It is important to note that the simple system employed in AUPC (whereby distant-end Eb/No is...
  • Page 589 -1 dB, the maximum power increase that can be permitted is 2 dB. You enter this into the CDM-625A as a setup parameter. If this value is ignored, or incorrectly entered, compression or saturation could occur, either during the initial re-balance, or during a fade event.
  • Page 590 Following the re-balance, the CDM-625A stores key parameters, such as Tx Power level, that are referred to as the Home State. In the event of a loss of communication between the two sides, the modem will revert to Home State, which is a known safe condition that will not cause TCP to be exceeded.
  • Page 591 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A ends of the link, but in a manner that ensures that TCP is not exceeded. In the vast majority of cases the TCP during a fade will not exceed its clear-sky value by more than +0.5 dB.
  • Page 592 64 kbps, an error message will be generated if a re-balance operation is requested. F.6.5 Solving the Problem of Self-Locking Self-locking is a problem that has been previously reported to Comtech EF Data Customer Service on CnC links that have identical data rates, FEC and modulation.
  • Page 593 3) Decide, arbitrarily, which is Side A, and which is Side B. 4) From the CDM-625A front panel, select the CONFIG  CnC  Mode menu: CnC Mode: APC,Side A,C-Band (Off, On, APC) Activate? N (Y,N) APC is not active ()
  • Page 594 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A Output Power Mode = CnC-Auto-Power-Control Level = -25.0dBm MaxPwrIncrease=2.5dB () On the bottom line, to edit the power output level and the maximum permitted increase in ◄ ► power level when in APC Mode: Use the...
  • Page 595 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A Displayed Message Expanded Meaning DistMargin too low There is insufficient local Eb/No margin for an APC re-balance Rx DataRate<64kbps The Rx data rate needs to be 64 kbps or higher for APC Rx DataRate<64kbps...
  • Page 596 Sect. 6.2.1.8.4 CONFIG: CnC  PMSI-Control (Chapter 6. FRONT PANEL OPERATION) 2. At this time, 1:N redundancy in the CRS-300/CRS-500 is not yet supported – a firmware update for these switches will be available in the future. Please consult Comtech EF Data Technical Support for updated information. F–28...
  • Page 597 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A DoubleTalk Carrier-in-Carrier Specifications Requires the two links to share a common carrier frequency (Outbound and Inbound symbol Operating Mode rates do not have to be equal) Power Spectral Density Ratio BSPK/QPSK/8-PSK/8-QAM: –7 dB to +11 dB (ratio of power spectral density, outbound...
  • Page 598 Revision 0 Appendix F MN-CDM625A Carrier-in-Carrier Summary Comtech EF Data’s DoubleTalk Carrier-in-Carrier can provide significant savings in operational expenses. The following should be considered when evaluating DoubleTalk Carrier-in-Carrier: • DoubleTalk Carrier-in-Carrier can only be used for full duplex links where the transmitting earth station is able to receive itself.
  • Page 599 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A • Transponder Bandwidth = 36 MHz • Power Available / MHz = 1995.26 / 36 = 55.424 W • If a carrier uses 24 dBW, its PEB = 10 / 55.424 = 4.532 MHz This corresponds to 12.59% of available transponder power.
  • Page 600 CDM-625A Advanced Satellite Modem Revision 0 Appendix F MN-CDM625A Co+No/No Ratio of Carrier Density (C ) + Noise (N ) to Noise Density (N ) (unit in dB): – 10log(B) [where B is bandwidth in Hz] C/N = C/N = C/N –...
  • Page 601 Appendix G. E MEASUREMENT Although the CDM-625A Advanced Satellite Modem calculates and displays the value of receive on the front panel of the unit, it is sometimes useful to measure the value using a spectrum analyzer, if one is available.
  • Page 602 CDM-625A Advanced Satellite Modem Revision 0 Appendix G MN-CDM625A Example: In the above diagram, the (Co+No)/No measured is 4.6 dB. If Rate 1/2 QPSK is used, this corresponds to an E of approximately 2.6 dB. The exact relationship used to derive the...
  • Page 603 CDM-625A Advanced Satellite Modem Revision 0 Appendix G MN-CDM625A G–3...
  • Page 604 CDM-625A Advanced Satellite Modem Revision 0 Appendix G MN-CDM625A Notes: G–4...
  • Page 605 Appendix H. EDMAC CHANNEL Theory of Operation H.1.1 EDMAC EDMAC is an acronym for Embedded Distant-end Monitor And Control. This feature permits user access to the M&C features of modems that are at the distant-end of a satellite link. This is accomplished by adding extra information to your data, but in a manner that is otherwise transparent.
  • Page 606 CDM-625A Advanced Satellite Modem Revision 0 Appendix H MN-CDM625A advantage over V.35 scrambling. This is fortunate, as there is a penalty to be paid for adding the framing: by adding the extra 5% to the transmitted data rate, the effective Eb/No that is seen will degrade by a factor of 10log(1.05), or 0.21 dB (0.07dB in the case of the two BPSK Turbo...
  • Page 607 CDM-625A Advanced Satellite Modem Revision 0 Appendix H MN-CDM625A Before the M&C data can be successfully transmitted and received, pairs of units must be split into EDMAC Masters and EDMAC Slaves. Masters are local to the M&C Computer, and Slaves are distant-end.
  • Page 608 CDM-625A Advanced Satellite Modem Revision 0 Appendix H MN-CDM625A Setup Summary To access a distant-end unit: • Designate a Master/Slave pair: Master at the local-end, Slave at the distant-end. • On the local-end unit, enable framing and EDMAC, define the unit as MASTER, then enter the bus address.
  • Page 609 25 Mbps may be used with ESC++. In all cases, if the Reed-Solomon outer codec is used, the 126/112 ratio is employed with ESC++. The new frame structure may be used with any FEC codec type available with the CDM-625A. J–1...
  • Page 610 CDM-625A Advanced Satellite Modem Revision 0 Appendix J MN-CDM625A Available Baud Rates At the lowest data rates, the 11.76% overhead may not allow all baud rates. Available rates are as follows: Data rate Baud rates available 64 to 127.999 kbps 1200, 2400, 4800 128 to 191.999 kbps...

  • Page 611: Network Configuration

    NETWORK CONFIGURATION Introduction The CDM-625A Advanced Satellite Modem’s handling of Ethernet terrestrial traffic data differs depending on whether the optional IP Packet Processor is either not installed or installed but disabled; or when the optional IP Packet Processor is installed and enabled .
  • Page 612 Figure 16-3. Ethernet Networking Loop Example (Simplified) Figure 16-3 shows a simplified version of this loop. As shown here, two switches have been connected – each switch has two or more separate connections. This is not how the CDM-625A’s K–2...
  • Page 613 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A Ethernet switches are designed to be used, and this configuration will cause a network outage. Networking Loops in Managed Switch Mode K.2.3.1.1 Hub-to-Hub using Ethernet Switches Figure 16-4. Networking Loop Example When connecting two or more “hub-sites”...
  • Page 614 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A K.2.3.1.2 Hub-to-Hub using Ethernet Routers Figure 16-5. Hub-to-Hub with Standard Traffic using Routers Figure 16-5 shows two hub-sites connected with standard Ethernet traffic, using routers instead of switches for the Ethernet connection. The routers will block the broadcasts coming from the remote network;...
  • Page 615 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A K.2.3.1.3 Hub-to-Remotes using Ethernet Switches or Routers Figure 16-6. Hub-to-Remotes with Standard Traffic using Routers or Switches Figure 16-6 shows a hub-to-remotes configuration using switches or routers with standard Ethernet traffic, the routers/switches will block broadcasts coming from the hub and remote networks;...
  • Page 616 Networking Loops in Router Mode (with IP Packet Processor) Figure 16-7. Point-to-Point Configuration in “Router Multipoint Hub” Working Mode In a network where more than one CDM-625A’s working mode is set to “Router Multipoint Hub”, care must be taken in route table configuration to avoid Ethernet Networking Loops.
  • Page 617 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A Ethernet Network Configurations in Managed Switch Mode K.3.1 Point-to-Multipoint Hub-to-Remotes, Split-path Traffic Using Routers Figure 16-8. Point-to-Multipoint using Routers Figure 16-8 shows hub-to-remotes configuration using routers with standard and split-path Ethernet traffic. A Static ARP Entry is needed in the switch so that routing of the Tx side of the modems will be on the correct port of the router.
  • Page 618 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A K.3.2 Point-to-Multipoint Hub-to-Remotes, Split-path Traffic Using Switches Figure 16-9. Point-to-Multipoint using Switches With switches used, the hub and remote are on the same subnet as shown in Figure 16-9, meaning that broadcasts will be allowed to transverse the network. Learning Mode must be disabled on the Hub Tx/Rx modem, because if a computer on the remote sends a broadcast out to the Hub, the modem learns that MAC is local –...
  • Page 619 Packet Processor installed and enabled in the CDM-625A and configured for Router Mode. This configuration features a Hub Outbound CDM-625A, with a rack of Hub Demods (Rx-only CDM- 625As are connected on single LAN networks), and Remotes (each) connected to a separate LAN network).
  • Page 620 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A Click [Add Entry] once each route is created. • For the “Hub Demod” Modem Configurations: o Referring to Sect. 6.5.4.3.2.1 Configuration | LAN | IP in Chapter 6. ETHERNET- BASED PRODUCT MANAGEMENT: From the page’s Network Configuration section, use the Working Mode drop-down menu to select the mode as Router Multipoint Hub, and then click [Submit] to accept this configuration change.
  • Page 621 WAN Upstream Interface – the WAN Upstream Interface is where all multicast packets are forwarded to the uplink interface if the multicast routing exists in the Routing table. The CDM-625A WAN interface is configured as Upstream Interface by default. K–11...
  • Page 622 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A K.4.2.1 Multicast Routing Configuration Figure 16-12. Configuration Example for a Multicast Routing Network To configure a Multicast Routing Network (Figure 16-12): • For “Hub Outbound” Modem Configuration – Referring to Sect. 6.5.4.3.3.1 Configuration | Routing | Routes in Chapter 6.
  • Page 623 K.5.2 Router Mode or Managed Switch Mode (with IP Packet Processor) When the optional IP Packet Processor is installed and enabled : The CDM-625A uses Comtech EF Data’s patented Streamline Encapsulation (SLE) Framing instead of HDLC Framing. Note that in SLE Framing, no bit stuffing overhead is involved; hence, WAN overhead is deterministic.
  • Page 624 • Packet Processor Redundancy is supported in both 1:1 and 1:N redundant configurations using the CRS-500 M:N Redundancy System. Refer to the pertinent switch Installation and Operation Manuals for detailed information on using the CDM-625A in a redundancy configuration. K–14...
  • Page 625 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A Advanced Network Timing K.7.1 Overview The Advanced Network Timing (ANT) feature provides IP-based protocols to synchronize the modem's internal time-of-day clock to an external device such as a time server, Base Station Controller (BSC), or Radio Network Controller (RNC).
  • Page 626 Best Master Clock (BMC) algorithm. This algorithm allows PTP devices to vote on which device has the best clock resolution. The CDM-625A will become a PTP master if there is no Grandmaster device or the Grandmaster is not reachable.
  • Page 627 LAN port. In this segment, the RNC/BSC is the master, and the near-end modem LAN port is the slave. Using the CDM-625A ‘A’ front panel or its Web Server Interface, set the PTP Grandmaster on this near-end modem as LAN.
  • Page 628 CDM-625A Advanced Satellite Modem Revision 0 Appendix K MN-CDM625A Notes: K–18...
  • Page 629 PROCESSOR OPTION Introduction The IP Packet Processor is an optional feature for the CDM-625A Advanced Satellite Modem. In addition to providing Layer 3 functionality, it incorporates a number of key features for Wide Area Network (WAN) bandwidth optimization, including very low overhead Streamline Encapsulation (SLE), Header Compression, Payload compression, Advanced Quality of Service (QoS), and Advanced Encryption Standard (AES) Encryption.
  • Page 630 HDLC. L.2.2 Modes of Operation Appendix K. ETHERNET NETWORK CONFIGURATION A CDM-625A equipped with the IP Packet Processor can operate in four modes to support Point- to-Point and Point-to-Multipoint network topologies: • Router Point-to-Point • Router Hub •...
  • Page 631 • Sect. 6.2.8 SELECT: FAST Menus (Chapter 6. FRONT PANEL OPERATION) If there is a need to upgrade the CDM-625A IP Packet Processor’s functionality, Comtech EF Data provides Fully Accessible System Topology (FAST), a technology that permits the purchase and installation of options through special authorization codes.
  • Page 632 CDM-625A Advanced Satellite Modem Revision 0 Appendix L MN-CDM625A L.2.5.1 Advanced Quality of Service (QoS) The IP Packet Processor incorporates multi-level QoS to ensure the highest quality of service with minimal jitter and latency for real-time traffic, priority treatment of mission critical applications and maximum bandwidth efficiency.
  • Page 633 Functionality and selection of the IP Packet Processor’s features and modes of operation, as specified in the previous section, is seamless via the CDM-625A’s operational interfaces. Equipment monitor and control (M&C) is possible via the methods outlined in this section.
  • Page 634 IP networks. An SNMP-managed network consists of three key components: The managed device – This includes the CDM-625A Advanced Satellite Modem. • The SNMP Agent – The software that runs on the CDM-625A. The CDM-625A SNMP • Agent supports both SNMPv1 and SNMPv2c.
  • Page 635 CDM-625A Advanced Satellite Modem Revision 0 Appendix L MN-CDM625A Figure L-2. CDM-625A Web Server (HTTP) Interface Home Page List of Supported Internet RFCs (Requests for Comment) RFC No. Description User Datagram Protocol Internet Protocol Transmission Control Protocol Ethernet Address Resolution Protocol...
  • Page 636 Overview This section describes the procedure required to field upgrade any user CDM-625A-Advanced Satellite Modem having a 175W AC or 125W DC Power Supply with the optional IP Packet Processor card. See Sections L.1.1 and L.1.2 in this chapter for a detailed description of the requirements and limitations of using the IP Packet Processor with the CDM-625A.
  • Page 637 L.5.3 Field Upgrade Procedure While the illustrations provided in this section depict upgrade of a CDM-625 Advanced Satellite Modem chassis, this procedure is identical for upgrade of the CDM-625A chassis). Step Task Turn off the CDM-625A and disconnect the modem’s power cord from its power source (CDM-625 chassis shown).
  • Page 638 CDM-625A Advanced Satellite Modem Revision 0 Appendix L MN-CDM625A Step Task The i llustration a t r ight i dentifies t he u pgrade l ocations within the chassis (CDM-625 chassis shown) for: Installation of the fan into the chassis;...
  • Page 639 CDM-625A Advanced Satellite Modem Revision 0 Appendix L MN-CDM625A Step Task Use the screwdriver and pliers, as needed, to install the fan (CEFD P /N P L-0000449) a nd f an gu ard ( CEFD P /N FN/FGDC12V01) s ecurely i nto t he c hassis w ith t he...
  • Page 640 CDM-625A Advanced Satellite Modem Revision 0 Appendix L MN-CDM625A Step Task Prepare t he I P P acket P rocessor C ard f or i nstallation b y aligning i ts r eceptacle w ith t he m ating c onnector o n t he modem’s framing board.
  • Page 641 Use t he screwdriver t o r einstall t he t op cover o nto t he CDM-625A chassis with its existing mounting hardware. Plug the modem’s power cord back into its power source. The CDM-625A IP Packet Processor upgrade is now complete and you may turn on and resume use of the modem. L–13...
  • Page 642 CDM-625A Advanced Satellite Modem Revision 0 Appendix L MN-CDM625A Notes: L–14...
  • Page 643 With a CCM system, severe rain fading can cause the total loss of the link, and zero throughput. ACM keeps the link up (with lower throughput) – and can yield much higher system availability. • ACM in the CDM-625A is used in conjunction with VersaFEC and is currently for IP traffic only. M–1...
  • Page 644 CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A Background ACM is not a new concept. It has been used for some time in wireless communications, including terrestrial microwave applications and, more recently, over satellite links. Its primary function is to optimize throughput in a wireless data link, by adapting the modulation order used and the Forward Error Correction code rate –...
  • Page 645 CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A Requirements for ACM A generic example of ACM-over-Satellite is shown in Figure M-1. There are a number of essential requirements for enabling this scheme: 1. A modulator and FEC encoder that can instantaneously, when commanded, change either modulation type (order) or FEC encoder rate, or both.
  • Page 646 CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A Figure M-1. ACM-over-Satellite – Generic Example M–4...
  • Page 647 CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A Existing Satellite ACM Scheme The best-known scheme for ACM-over-Satellite is covered in the DVB-S2 specification (EN 302307) ratified by ETSI in March 2005. While primarily for digital video broadcast, the DVB-S2 specification also encompasses two-way interactive services.
  • Page 648 CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A Most importantly, however, LDPC codes can now be designed that yield almost equivalent coding gain, but with considerably shorter block lengths. • In an ACM mode, no overhead channel was defined by DVB-S2 for the purpose of reporting SNR metrics to the originating end.

  • Page 649: Table M-1. The Versafec Modcod Set

    CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A Table M-1. The VersaFEC ModCod set Spectral Typical Latency at Min. Max. Code Block Modulation efficiency, Eb/No, for 64 kbps, in Data Rate, Data Rate, Rate size, bits bps/Hz BER = 5 x 10...

  • Page 650: Table M-2. Versafec Implementation Of Acm - 100 Ksymbols/Sec Example Case

    CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A VersaFEC ACM Latency In an ACM system that has a number of ModCods, each having a different latency, what defines the overall system latency? The answer is simple – the latency of the worst-case ModCod. (This may not seem obvious to some, and it is beyond the scope of this chapter to provide a rigorous defense of this statement.
  • Page 651 VersaFEC ACM requires the appropriate FAST code for the maximum operating symbol rate. Configuration is very straightforward from the CDM-625A front panel. For a detailed overview of modem operations via the front panel, refer to Chapter 6. FRONT PANEL OPERATION. Follow...
  • Page 652 CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A Step Task Front Panel VFD Mnemonic (SELECT) CONFIG: ACM  CONFIG: All Mode Tx Clocks Configure the desired ACM operating parameters, EDMAC Misc Mask Remote IP () by selecting the ACM submenu from the CONFIG: menu branch.
  • Page 653 Monitoring ACM performance The CDM-625A provides several ways to determine the current state of the ACM system. Use the front panel menu to select MONITOR: ACM. The the current Tx and Rx ModCod, along with the Local and Remote SNR, are displayed here. The SNR displays values between –3.0 dB and +22.0 dB, with a resolution of 0.1 dB.
  • Page 654 In order to mitigate packet loss when bandwidth is reduced, the CDM-625A ACM system incorporates a method for congestion control. This is illustrated in Error! Reference source not found.:...
  • Page 655 ACM in order to protect the link. The AUPC scheme is, in most respects, identical to the ‘standard’ AUPC found in the CDM-625A. The signicant difference is that it does not require an additional overhead mode to be selected (such as EDMAC) in order to transmit SNR metrics to the other end of the link.
  • Page 656 To achieve minimum latency, set the WAN buffer to the smallest practical value. The default setting is 20ms, and we recommend keeping it at this level. • All IP features that are available in the CDM-625A (VLAN, QoS, etc) are available when in IP-ACM mode. The Sub-Mux feature, however, is not available. •...
  • Page 657 The CDM-625A was purposely architected to provide the platform for VersaFEC ACM, and has required new approaches to the signal processing employed in both modulator and demodulator. It is the intention of Comtech EF Data to include VersaFEC ACM in future modem platforms.
  • Page 658 CDM-625A Advanced Satellite Modem Revision 0 Appendix M MN-CDM625A M.13 VersaFEC ACM – Summary of Specifications Adaptive Coding and Modulation, using BPSK, QPSK, 8-QAM , 16-QAM and System type VersaFEC short-block LDPC coding - total of 12 ModCods Symbol Rate Range...
  • Page 659 Appendix N. IP S Introduction Subsystem Multiplex – referred to throughout this manual as Sub-Mux – is a secondary framing structure that combines IP traffic with any currently available combination of framing and interface type (excluding IP itself). The composite data rate to the modulator and from the demodulator is referenced to the primary, non-IP interface rate by a specific ratio selected by the user.
  • Page 660 CDM-625A Advanced Satellite Modem Revision 0 Appendix N MN-CDM625A This gives you 34 ratios from which to choose. If framing is on, the overhead associated with the selected frame structure is applied to the primary data only, and the IP ratios above are fractions of the framed primary data.
  • Page 661 Appendix P. OPEN NETWORK OPERATIONS Overview This appendix summarizes the functionality and specifications of the IBS, Drop and Insert (D&I), and IDR Open Network framing modes. Primary Data Rates Supported G.703 1544, 2048, 6312 and 8448 kbps SD, RD EIA-422, V.35, LVDS N x 64 kbps SD, RD (up to 8448 kbps) ADPCM Audio (2 Channels) 64 kbps only, full duplex...
  • Page 662 CDM-625A Advanced Satellite Modem Revision 0 Appendix P MN-CDM625A P.2.1 IBS Clock/Data Recovery and De-jitter This feature performs clock and data recovery on the G.703 format. Clock de-jitter and data encoding/decoding is done as with the IDR configuration. P.2.2 IBS Framing...
  • Page 663 CDM-625A Advanced Satellite Modem Revision 0 Appendix P MN-CDM625A Drop and Insert (D&I) Primary Data Rates Supported 1544 kbps SD, RD, DDO, IDI G.703, EIA-422, V.35 and Serial LVDS 2048 kbps SD, RD, DDO, IDI N x 64 kbps Satellite Data Rates Supported...
  • Page 664 CDM-625A Advanced Satellite Modem Revision 0 Appendix P MN-CDM625A P.3.1 D&I Primary Data Interfaces When configured for D&I operation, multiplexing/demultiplexing follows the IBS satellite frame structure and ESC features, but with the following changes: • It accepts and outputs primary data through the G.703 connectors.
  • Page 665 CDM-625A Advanced Satellite Modem Revision 0 Appendix P MN-CDM625A Primary Data Rates Supported G.703 1544 kbps SD, RD EIA-422 (Replaces 8K Overhead) 2048 kbps SD, RD V.35 (Replaces 8K Overhead) 6312 kbps SD, RD 8448 kbps SD, RD Engineering Service Channel...
  • Page 666 CDM-625A Advanced Satellite Modem Revision 0 Appendix P MN-CDM625A P.4.1 IDR Primary Data Interfaces When configured for IDR operation, the board performs these functions: • It receives and performs clock and data recovery on incoming G.703 T1 and E1 pseudo- ternary data.
  • Page 667 OQPSK is an acronym for Offset Quadrature Phase Shift Keying modulation. OQPSK is a variation of normal QPSK that is offered in the CDM-625A Advanced Satellite Modem. Normal band limited QPSK produces an RF signal envelope that necessarily goes through a point of zero amplitude when the modulator transitions through non-adjacent phase states.
  • Page 668 CDM-625A Advanced Satellite Modem Revision 0 Appendix Q MN-CDM625A Notes: Q–2...
  • Page 669 – Layer 2 QoS and Layer 3 QoS: • Layer 2 QoS is available on the CDM-625A by default when the optional IP Packet Processor card is either not installed, or is installed but disabled . Layer 2 QoS is based on OSI model Layer 2 header parameters such as IEEE 802.1q VLAN priority field, and is...

  • Page 670: Table 20-1. Modem Tx Data Rate Vs. Qos Tx Data Rate (Hardware-Limited

    Layer 2 QoS Tx bandwidth can be set near to the modem’s data rate. Table 20-1 lists the step sizes for both CDM-625A hardware versions. Note that the Layer 2 QoS scheduling algorithm runs on the basis of QoS Tx data rate; however, the modem can send only the modem Tx data rate.
  • Page 671 R.2.2 Flow Control In Layer 2 QoS mode, the CDM-625A supports Ethernet-based pause frame control (IEEE 802.3). Flow control can be enabled or disabled independently in any of the LAN ports. Flow Control requires WAN Buffer Length to be large enough so that Data Rate in kbps x buffer length / 4096 ≥...
  • Page 672 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A QUESTION: What is the total output data rate and what is individual ports output data rate? ANSWER: • Based on Table 20-1 for a modem Tx bandwidth of 1 Mbps, the QoS output bandwidth is set to 1 Mbps.

  • Page 673: Table 20-2. 802.1Q To Layer 2 Qos Priority Conversion

    CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A Remaining Data L2 QoS Input QoS Output Port Rate* (After Serving Output Data Rate Priority Data Rate Data Rate the Priority Queue) 500 Kbps 500 Kbps 2500 Kbps 500 x (2.5/3) = 417 Kbps...
  • Page 674 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A In case VLAN Q-in-Q (double VLAN tag), the L2 VLAN QoS considers first VLAN tag priority field only for traffic prioritization. QoS Example 4 1. VLAN-based Layer 2 QoS mode is selected.
  • Page 675 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A • Port 3 priority is set to 3; • Ports 2 and 4 priorities are set to trunk mode (native disabled). 3. The modem data rate is set to 4000 Kbps.
  • Page 676 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A Layer 3 QoS Layer 3 QoS scheduling operates on modem Tx bandwidth with 1-byte resolution, so there is further trimming or clipping data rate after the QoS scheduler. Layer 3 QoS is implemented with at least one 1-second burst at maximum data rate. So Layer 3 QoS can process much larger bursts than Layer 2 QoS.
  • Page 677 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A Dest VLAN Src IP/ Min Src Index Protocol Priority Filter WRED Range mask Port mask Port Port Port 0-4094 ***/* ***/* 65535 65535 0-4094 ***/* ***/* 65535 65535 99999 HTTP 0-4094...
  • Page 678 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A R.3.2 Layer 3 QoS Min-Max Mode In Min-Max mode, up to 32 QoS rules can be configurable using source IP subnet, destination IP subnet, source port range, destination port range, and protocol. For each created rule, you can also set the QoS treatment, such as guaranteed minimum bandwidth, maximum clipping bandwidth, WRED enable or disable, and filter rule.
  • Page 679 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A • In this mode, the minimum bandwidth for all rules – the excluding the default rule – will be served first in round robin fashion. In this example, the total minimum BW for Rules 1 and 2 is 5000 Kbps. Since the total bandwidth is 20 Mbps, it has enough bandwidth to serve.
  • Page 680 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A R.3.3 Layer 3 QoS DiffServ Mode Layer 3 DiffServ QoS is fully compliance to RFC standards. When the Layer 3 QoS mode is set to DiffServ, the system automatically configures the rules with DSCP code points, priority values, and WRED.
  • Page 681 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A • The resulting individual data rates are as follows: Stream Priority PHB / DSCP Code Service Rate Drop Precedence Data Rate Management CS7 / b111000 200 Kbps 9.8 Mbps 200 Kbps...
  • Page 682 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A QoS with ACM (Adaptive Coding and Modulation) When ACM is enabled, the modem is configured with symbol rate. However, while the QoS system recognizes data rate, both Layer 2 QoS and Layer 3 QoS operate on data rate. Therefore, while the symbol rate will be constant in ACM mode, the data rate will not be constant.
  • Page 683 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A • Since ASFD 4 has the service rate 100 Kbps, the excess 75 Kbps will be given the other queues where the service rate not met. • In this case the 75 Kbps again will share equally among ASFD3, ASFD2, and ASFD1 since these service rates were not met.
  • Page 684 CDM-625A Advanced Satellite Modem Revision 0 Appendix R MN-CDM625A Notes: R–16...
  • Page 685 (particularly with non-round constellations). A White Paper that is to be published by Comtech EF Data after the initial release of the CDM-625A will offer precise guidelines on the amount of additional output backoff (OBO) that is required for these new rolloffs.
  • Page 686 Now that you can choose between six different values of Txα, it now becomes important to match the Rx Alpha (Rxα) accordingly . Comtech EF Data has analyzed the effect of mismatching Txα and Rxα, and has concluded that there is little benefit in providing six values of Rxα.
  • Page 688 2114 85281 WEST TH STREET TEMPE ARIZONA 480 • 333 • 2200 PHONE 480 • 333 • 2161...

Table of Contents

Save PDF