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Charles 3608-80 Secondary T1 Unit Manual

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CONTENTS
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AR AY
+
SEC
T1
TP LP
e2006 Charles Industries Ltd.
All rights reserved. Printed in United States of America.
The availability of features and technical specifications herein subject to change without notice.
Telecommunications Group
3608-80 Secondary T1 Unit
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MON
RCV XMT
ACO
BYPASS
Figure 1. 3608-80 T1 Secondary Unit Front Panel
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PWR
Section 360-880-202
Equipment Issue 2
Third Printing, August 2006
PAGE
3608−80
Page 1 of 18
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  • Page 1: Table Of Contents

    Section 360-880-202 Equipment Issue 2 Telecommunications Group Third Printing, August 2006 3608-80 Secondary T1 Unit CONTENTS PAGE Part 1. GENERAL ................

  • Page 2: Part 1. General

    Section 360-880-202 GENERAL Document Purpose This document provides general, installation and testing information for the Secondary T1 Unit (ST1U), shown in Figure 1. This document covers model number 3608-80. Document Status This document is reprinted to add additional features (”Dual” and “Protection” T1 modes). Equipment Function The ST1U is part of the 360-80 Intelligent Channel Bank (ICB).

  • Page 3: Part 2. Inspection

    Equipment Identification Charles Industries’ equipment is identified by a model and issue number imprinted on the front panel or located elsewhere on the equipment. Each time a major engineering design change is made on the equipment, the issue number is advanced by 1 and imprinted on subsequent units manufactured.

  • Page 4: Part 3. Application Guidelines

    D Always use the original static-protective packaging for shipping or storage. Return a tested unit to its original protective packaging for storage. APPLICATION GUIDELINES The ST1U is used only in the 360-80 ICB. Using the 3608-80 ST1U in any other Charles product will cause im- proper operation and could damage the equipment. Note:...
  • Page 5 Section 360-880-202 360-80 360-80 Primary T1-S T1-S Secondary ST1U ST1U Figure 3. Combined Dual T1 Application Transport Protection Application The Protection mode allows the Primary T1 of the T1-S and the Protection T1 of the ST1U to be connected to a remote 360-80 or an Automatic Protection Switch (APS) device.
  • Page 6 Section 360-880-202 Additionally, data/voice from cards in the 360-80 can be “re-inserted” into any vacant timeslots to the remote loca- tion. This allows better use of the T1 timeslots by keeping them as full as possible between locations. See Figure 6 for an application where the 360-80 is used to “drop” channels and re-insert channels from multiple loca- tions to reduce the number of T1s needed between locations by keeping the T1 full.

  • Page 7: Part 4. Circuit Description

    Section 360-880-202 CIRCUIT DESCRIPTION Figure 8 shows a block diagram of the ST1U, and its relationship to other elements of the 360-80 ICB. Normal (Drop and Re-Insert) Mode Configuration The T1-S provides the centralized control, multiplexing and test features for the 360-80 ICB. T1 signals from and to the WEST (primary T1) direction are first routed through the ST1U to the T1-S.
  • Page 8 Section 360-880-202 4.1.1. Transmission Path, WEST RCV to EAST XMT (Normal Mode Only) T1 signals received from the WEST facility (J6) pass through the ST1U bypass circuit, through the rear-panel connection (J5), into the T1-S. The information, in DS0 timeslots that are dropped at this location, can be provi- sioned to pass (through an internal circuit) on to the T1 on the ST1U (Broadcast) or replaced with idle code.
  • Page 9 Section 360-880-202 When a channel uses multiple timeslots such as 64xN, ISDN and Router unit, there must be enough consecutive timeslots to allow the channel to be allocated (an example is shown in Figure 9 where channel 24 uses timeslots 22−24 on the primary T1). For the Protection mode, only the 24 timeslots for the Primary T1 are allocated.
  • Page 10 Section 360-880-202 1 2 3 4 5 6 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Secondary T1 Timeslot Figure 9. Timeslot Allocation with T1-S and ST1U Timeslot Mode (Normal Mode Only) The ST1U and T1-S use the timeslot mode to control the routing of data between T1-S and ST1U. The timeslot mode can be set to idle or broadcast.
  • Page 11 Section 360-880-202 4.5.3. Timeslot Allocated on the Secondary T1 Circuit When a timeslot is allocated from the secondary T1 to a channel, the timeslot mode of the secondary T1 timeslot is ignored and does not affect the data routing. Data is routed from the allocated channel to and from the time slot on the secondary T1 circuit.

  • Page 12: Part 5. Installation

    Section 360-880-202 1. All channel units are busied or idled 2. A yellow alarm (AY) condition is sent to the WEST transmit facility (if CM2 or CM3 is selected, a yel- low alarm is not sent) 3. An AIS signal is sent to the EAST transmit facility on all unassigned channels going between EAST and secondary 4.
  • Page 13 Section 360-880-202 SEC T1/EAST T1CU PRI T1/WEST Figure 15. 3608-80 ST1U Rear Panel 5.1.2. Installing a New Unit Use the following steps to install the ST1U. Step Action If not already installed, install the rear panel, screwing it to the appropriate mounting locations on the shelf using the provided hardware.
  • Page 14 Section 360-880-202 3608−80 Rear View 3608−80 Rear View STIU TI-S TI-S STIU WEST EAST TI-S DS1/T1 toward network Figure 16. Wiring for Drop and Re-Insert Application 5.2.2. Dual and Protection Applications Use the following steps to wire the unit (see Figure 17). Step Action Connect the T1 from the WEST 360-80 ICB or equivalent to J1 of the T1-S.

  • Page 15: Part 6. Optioning

    PRI T1 alarm registers (Normal, CM2, CM3). See section on network management for more information. TECHNICAL ASSISTANCE If technical assistance is required, contact Charles Industries’ Technical Services Center at: 847-806-8500 847-806-8556 (FAX) 800-607-8500...

  • Page 16: Part 9. Warranty & Customer Service

    Charles Industries, Ltd. offers a standard repair or exchange service for units either in- or out-of-warranty. With this service, units may be shipped to Charles Industries for either repair and quality testing or exchanged for a replacement unit, as determined by Charles Industries. Follow the Repair Service Procedure below to return units and to secure a repair or replacement.

  • Page 17: Part 10. Specifications

    Section 360-880-202 SPECIFICATIONS 10.1 Electrical Parameter Specification Carrier Mode Pulse Code Modulation (PCM) DS1 1.544MB/S Framing Format T1 interface complies with the T1.403 standard: SF format: Yellow Alarm, Line loopback, Payload loopback ESF format: Yellow Alarm, Facility data link, Line loopback, Payload loopback Line code (software selectable) B8ZS or AMI...
  • Page 18 Section 360-880-202 Table 3. Physical Specifications Feature U.S. Metric Height 0.75 inch 1.9 centimeters Width 5.64 inches 14.32 centimeters Depth 9.25 inches 23.49 centimeters Weight 0.64 pound 290 grams Temperature −40_ to +149_ F −40_ to +65_ C Humidity to < 95% g g g...

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