Patton electronics 2701/B User Manual
G.703/g.704 ntu with eia-530, v.35, x.21 interfaces
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- Specification sheet (2 pages) ,
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Summary of Contents for Patton electronics 2701/B
- Page 1 Part# 07M2701/X Doc# 086101U Rev. B Revised 1/6/05 An ISO-9001Certified Company USER MANUAL MODEL 2701/B, C, D G.703/G.704 NTU with EIA-530, V.35, X.21 Interfaces SALES OFFICE (301) 975-1000 TECHNICAL SUPPORT (301) 975-1007...
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Page 2: Table Of Contents
CONTENTS Warranty Information ... 4 Radio and TV Interference... 4 CE Notice... 4 Service... 5 General Information... 6 Features... 6 Description... 6 Configuration ... 7 DIP Switch Configuration... 7 Switch SW1-1 through SW1-5... 8 SW1-6 and SW1-7 Clock Modes... 9 SW1-8: Enable/Disable Loop Tests from DTE ... - Page 3 A.5 Line Framing ... 21 A.6 CRC-4 Multiframing ... 21 A.7 Clocking ... 21 A.8 Time Slot Rate ... 21 A.9 Network Data Rates ... 21 A.10 Distance ... 21 A.11 Configuration ... 21 A.12 Power Supply ... 22 A.13 Humidity ... 22 A.14 Temperature ...
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Page 4: Warranty Information
1.0 WARRANTY INFORMATION Patton Electronics warrants all Model 2701/I components to be free from defects, and will—at our option—repair or replace the product should it fail within one year from the first date of shipment. This warranty is limited to defects in workmanship or materials, and does not cover customer damage, abuse, or unauthorized modification. -
Page 5: Service
1.3 SERVICE All warranty and non-warranty repairs must be returned freight prepaid and insured to Patton Electronics. All returns must have a Return Materi- als Authorization number on the outside of the shipping container. This number may be obtained from Patton Electronics Technical Services at: •... -
Page 6: General Information
2.0 GENERAL INFORMATION Thank you for your purchase of this Patton Electronics product. This product has been thoroughly inspected and tested and is warranted for One Year parts and labor. If any questions or problems arise during installation or use of this product, please do not hesitate to contact Pat- ton Electronics Technical Support at (301) 975-1007. -
Page 7: Configuration
3.0 CONFIGURATION The Model 2701 features configuration capability via hardware DIP switches. This section describes all possible DIP switch configurations of the Model 2701. 3.1 DIP SWITCH CONFIGURATION The Model 2701 has two sets of internal DIP switches that allow configu- ration for a wide range of applications. -
Page 8: Switch Sw1-1 Through Sw1-5
Switch SW1-1 through SW1-5 A detailed description of each switch (SW1-1 through SW1-5) setting fol- lows the summary table below. Table 1: Switch Set 1 Summary Table Speed 64 kbps 128 kbps 192 kbps 256 kbps 320 kbps 384 kbps 448 kbps 512 kbps 576 kbps... -
Page 9: Sw1-6 And Sw1-7 Clock Modes
Note When the data rate is set to 2.048Mb/s, the unit is forced into G.703 mode, and it transmits user data on all 32 time-lots. There is no framing information; therefore, the CRC4 MF (SW2-2) switch is ignored. In all other rate settings, the unit employs G.704 framing;... -
Page 10: Sw1-8: Enable/Disable Loop Tests From Dte
SW1-8: Enable/Disable Loop Tests from DTE Use Switch SW1-8 to allow Model 2701 to enter loopback tests when the DTE raises the appropriate loop request pin. S1-8 Response to DTE Loopback Request Enabled Response to DTE Loopback Request Disabled Position Function SW2-1 Line Coding... -
Page 11: Switch Sw2-2: Crc-4 Multiframe
Every other pulse is inverted from the previous pulse in polarity, so that the signal can be effectively transmitted. This means, however, that a long sequence of zeros in the data stream will cause problems, since the NTU receiving the signal relies on the signal to recover the 2.048 Mb/s clock. -
Page 12: Switch Sw2-4: Remote Digital Loopback Type
Switch SW2-4: Remote Digital Loopback Type The user can set this switch to select the type of remote loop that will be initiated by the Model 2701. If set to V.54, the Model 2701 will initiate a V.54 loop when Remote Loop is selected by the front panel switches. If set to CSU, the Model 2701 will initiate a CSU loop when Remote Loop is selected by the front panel switches. -
Page 13: Installation
4.0 INSTALLATION Once the Model 2701 is properly configured, it is ready to connect to the G.703/G.704 interface, to the serial port, and to the power source. This section describes how to make these connections. 4.1 CONNECTING TO THE G.703 NETWORK The Power, G.703/G.704 and serial Line connections are located on the rear panel of the Model 2701. -
Page 14: Connecting The Serial Port
120 ohm G.703/G.704 network channel. Figure 4. G.703/G.704 170 ohm Connection. 4.2 CONNECTING THE SERIAL PORT The Model 2701/B, C, D supports RS-530, V.35, X.21 serial port connec- tions. This section describes how to connect the serial ports to your ter- minal equipment. -
Page 15: Connecting To A "Dce" Device
Connecting to a “DCE” Device If the Model 2701 serial interface is hard-wired as a DCE (all except the X.21 version), you must use a null modem cable when connecting to a modem, multiplexer or other DCE device. This cable should be of the shortest possible length—we recommend 6 feet or less. -
Page 16: Dc Power
DC Power The 36–60 VDC DC to DC adapter supplied with the DC version of the Model 2701 plugs in a DC source (nominal 48 VDC) and plugs into the barrel power supply jack on the rear of the 2701. Refer to Figure 5 to make the proper connection. -
Page 17: Operation
When the Model 2701 has been properly configured and installed, it should operate transparently. This sections describes power-up, LED status monitors, and the built-in loopback test modes. 5.1 POWER-UP Before applying power to the Model 2701, please read “Power Connec- tion”... -
Page 18: Loop (V.54 & Telco) Diagnostics
The Model 2701 offers three V.54 loop diagnostics. Use these diagnos- tics to test the NTU and any communication links. These tests can be activated via the front panel switches or via signals on the Model 2701/B and C serial port interface. -
Page 19: Operating Remote Digital Loopback (Rl)
To perform an RDL test, follow these steps: 1. Activate RDL. This may be done in two ways: — Activate the “RL” signal on the DTE (2701/B and 2701/C only). If you are not sure which lead is the “RL” signal, please refer to... -
Page 20: Csu Loop
— Set the front panel switch to “Remote”. 2. Perform a bit error rate test (BERT) using the internal V.52 genera- tor (as described in section “Using the V.52 (BER) Test Pattern Generator”), or using a separate BER Tester. If the BER test indi- cates a fault, and the Local Line Loopback test was successful for both NetLink devices, you may have a problem with the twisted pair line connection. -
Page 21: Specifications
APPENDIX A SPECIFICATIONS A.1 NETWORK DATA RATE 2.048 Mbps A.2 NETWORK CONNECTOR RJ-48C/Dual Coax BNC (2701/D) A.3 NOMINAL IMPEDANCE 75/120 ohm A.4 LINE CODING Selectable AMI or HDB3 A.5 LINE FRAMING G.703 (Unframed) or G.704/G.732 (Framed) A.6 CRC-4 MULTIFRAMING Selectable On or Off A.7 CLOCKING Internal, External, or Network (Receive Recover) A.8 TIME SLOT RATE... -
Page 22: Power Supply
A.12 POWER SUPPLY +5 VDC External power supply/100–240 VAC, 50–60Hz, 0.4A A.13 HUMIDITY Up to 90% non-condensing A.14 TEMPERATURE 0 to 50°C (32 to 122°F) A.15 DIMENSIONS 9.0L x 5.3W x 2.0H cm (3.5L x 2.1W x 0.78H in.) -
Page 23: B Interface Pin Assignment
APPENDIX B INTERFACE PIN ASSIGNMENT EIA-530 Interface Pin Description (DB-25 Female Connector) (DCE Configuration) Pin # Signal FG (Frame Ground) TD (Transmit Data) RD (Receive Data) RTS (Request to Send) CTS (Clear to Send) DSR (Data Set Ready) SGND (Signal Ground) CD (Carrier Detect) RC/ (Receive Timing-B) CD/ (Carrier Detect-B) -
Page 25: C Interface Pin Assignment
APPENDIX C INTERFACE PIN ASSIGNMENT V.35 Interface (M/34F Female Connector) (DCE Configuration) Pin # Signal SGND (Signal Ground) RTS (Request to Send) CTS (Clear to Send) DSR (Data Set Ready) CD (Carrier Detect) DTR (Data Terminal Ready) LLB (Local Line Loop) TM (Test Mode) RDL (Remote Digital Loop) TD (Transmit Data) -
Page 27: D Interface Pin Assignment
APPENDIX D INTERFACE PIN ASSIGNMENT X.21 Interface (DB-15 Female Connector) (DTE /DCE Configuration) Pin # Signal Frame Ground T (Transmit Data-A) C (Control-A) R (Receive Data-A) I (Indication-A) S (Signal Element Timing-A) BT (Byte Timing-A) SGND (Signal Ground) T/ (Transmit Data-B) C/ (Control-B) R/ (Receive Data-B) I/ (Indication-B) -
Page 28: Factory Replacement Parts And Accessories
FACTORY REPLACEMENT PARTS AND ACCESSORIES Patton Model # 2701/B G.703/G.704 NTU with RS-530 interface 2701/C G.703/G.704 NTU with a V.35 interface 2701/D G.703/G.704 NTU with an X.21 interface 2701/I G.703/G.704 NTU w/ 10Base-T EN interface 0805US American Power Cord 0805EUR...