Panasonic DBS Section 500 Reference Manual

Digital Business System

Section 500

T1

Reference

Manual

503X00501B

Revised April 2000

The contents of this manual are subject to change without notice and do not constitute a
commitment on the part of Panasonic Telecommunication Systems Company (PTSC). Every
effort has been made to ensure the accuracy of this document. However, due to ongoing product
improvements and revisions, Panasonic cannot guarantee the accuracy of printed material after
the date of publication nor can it accept responsibility for errors or omissions. Panasonic will
update and revise this document as needed.

The software and hardware described in this document may be used or copied only in accordance
with the terms of the license pertaining to said software or hardware.

Reproduction, publication, or duplication of this manual, or any part thereof, in any manner,
mechanically, electronically, or photographically, is prohibited without permission of the

Panasonic Telecommunication Systems Company (PTSC).

 Copyright 1996 by Panasonic Telecommunication Systems Company (PTSC)

Revised April 2000. All rights reserved.

T-SMART and T-SERV II are registered trademarks of ADC Kentrox.
Premier is a registered trademark of U.S. Sprint.
Reference to third-party products is for information only and does not constitute an endorsement
or recommendation. Panasonic does not assume responsibility for the performance of third-party
products.

Contents

About This Manual

Overview............................................................................................................................. ix

Related Documents............................................................................................................. ix

Chapter 1. Introduction to the T1 Interface

Overview................................................................................................................................. 1-3

Description of the T1........................................................................................................ 1-3

Framing Options ............................................................................................................... 1-3

Trunk Signaling Modes .................................................................................................... 1-4

DNIS Service.................................................................................................................... 1-4

Pre-Installation Requirements................................................................................................. 1-5

Ordering T1....................................................................................................................... 1-5

What You Must Purchase ................................................................................................. 1-6

Chapter 2. Installation

Guidelines............................................................................................................................... 2-3

Hardware Requirements ................................................................................................... 2-3

Maximums ........................................................................................................................ 2-3

Trunk Assignments for Single-Cabinet Systems.............................................................. 2-5

Trunk Assignments for Double-Cabinet Systems ............................................................ 2-6

Installation Procedures.......................................................................................................... 2-12

Installing the CSU........................................................................................................... 2-12

Installing a T1 in a Single Cabinet.................................................................................. 2-14

Installing T1 in a Double Cabinet with the T1 in the Slave ........................................... 2-21

Installing T1 in a Double Cabinet with T1s in the Master and Slave............................. 2-23

Chapter 3. Quick-Start Programming

Before You Begin................................................................................................................... 3-3

Programming Initial T1 Options............................................................................................. 3-4

Minimum Programming ................................................................................................... 3-4

DNIS Programming.......................................................................................................... 3-7

Revised April 2000 DBS-2.3/9.2-500 iii

Chapter 4. Programming Reference

T1 System Settings ................................................................................................................. 4-3

System Size....................................................................................................................... 4-3

Clock Settings................................................................................................................... 4-4

System-Wide Timers .............................................................................................................. 4-7

Digital Pad Settings .............................................................................................................. 4-14

Extension Port Settings................................................................................................... 4-16

Trunk Port Settings......................................................................................................... 4-17

Master and Slave Settings..................................................................................................... 4-18

Trunk Configuration ....................................................................................................... 4-18

Trunk Signaling .............................................................................................................. 4-19

Alarm Settings ...................................................................................................................... 4-21

Alarm Descriptions......................................................................................................... 4-21

Alarm Transmission Options.......................................................................................... 4-24

Alarm Timers ................................................................................................................. 4-25

Error Counters for FF Alarm Keys................................................................................. 4-29

Alarm Relay Controls..................................................................................................... 4-32

Trunk Settings....................................................................................................................... 4-35

FF Key Settings .................................................................................................................... 4-42

Special T1 Function Codes................................................................................................... 4-43

Appendix A. CPC-EX 1.0 Updates

Appendix B. CPC-EX 2.32 Updates

iv DBS-2.3/9.2-500 Revised April 2000

List of Figures

Figure 2-1 CSU installation .............................................................................................. 2-12

Figure 2-2 SCC-B Switch 4 .............................................................................................. 2-14

Figure 2-3 Connector 4 (CN4) strapping, Sync Unit ........................................................ 2-15

Figure 2-4 T1 Sync Unit installation ................................................................................ 2-16

Figure 2-5 T1 MDF card installation ................................................................................ 2-17

Figure 2-6 Sync Unit and T1 connection, single-cabinet installation ..............................2-18

Figure 2-7 RJ48 pinouts, CN1 connector ......................................................................... 2-19

Figure 2-8 T1 cabinet connections, single-cabinet installation ........................................ 2-20

Figure 2-9 Sync cable connections, double-cabinet with a T1 in the slave ...................... 2-22

Figure 2-10 Clock sync cable and sync cable connections, double-cabinet installation ....2-24

Figure 4-1 Circuit-type numbers ......................................................................................4-14

Figure 4-2 Default pad values .......................................................................................... 4-15

Figure 4-3 Pad Nos........................................................................................................... 4-15

Figure A-1 CPC-EX ............................................................................................................. A-5

Figure A-1 Desk Stand Removal.......................................................................................... A-6

Figure A-1 Inserting the wall mount bracket (rotated desk stand) ...................................... A-6

Figure A-1 Handset guide insertion for wall mounting, key telephone ............................... A-7

Figure A-1 44-Series Small-Display Phone ......................................................................... A-8

Figure A-1 44-Series Large-Display Phone ....................................................................... A-10

Figure A-1 DSS/72 Console (VB-44320) key layout ........................................................ A-21

Figure A-1 DSS/72 #1 Default Extension Numbers .......................................................... A-22

Figure A-1 EM/24 Unit (VB-44310) keys ......................................................................... A-24

Figure A-1 CPC-EX Serial Port 2 ...................................................................................... A-29

Figure A-1 T1 Network Extension Numbering ................................................................ A-32

Figure A-1 T1 Network Call Priority Routing ................................................................... A-33

Figure A-1 SMDR Format for CPC-EX............................................................................ A-42

Revised April 2000 DBS-2.3/9.2-500 v

vi DBS-2.3/9.2-500 Revised April 2000

List of Tables

Table 2-1. EC/TRK slot usage for T1 ................................................................................ 2-3

Table 2-2. T1 and analog trunk assignments, DBS 40 ....................................................... 2-5

Table 2-3. T1 and analog trunk assignments, DBS 72 ....................................................... 2-5

Table 2-4. T1 and analog trunk assignments, DBS 96 ....................................................... 2-6

Table 2-5. Maximum T1 assignments for two-cabinet systems ......................................... 2-6

Table 2-6. T1 and analog trunk assignments, DBS 40 + 40 ............................................. 2-7

Table 2-7. T1 and analog trunk assignments, DBS 72 + DBS 72 .................................... 2-8

Table 2-8. T1 and analog trunk assignments, DBS 96 + DBS 40 .................................... 2-9

Table 2-9. T1 and analog trunk assignments, DBS 96 + DBS 72 .................................. 2-10

Table 2-10. T1 and analog trunk assignments, DBS 96 + DBS 96 .................................. 2-11

Table 2-11. Switch settings for SW1 on the T1 card ......................................................... 2-18

Table 4-1. T1 alarm definitions ........................................................................................ 4-21

Table 4-2. Alarm-related programs ..................................................................................4-22

Table 1-1. Guidelines for ordering T1 services .................................................................. 1-5

Table 1-2. T1 Hardware requirements for single-cabinet systems ..................................... 1-6

Table 1-3. T1 Hardware requirements for double-cabinet systems ...................................1-6

Table 1-4. CSU equipment required for T1 .......................................................................1-7

Table 2-1. EC/TRK slot usage for T1 ................................................................................ 2-3

Table 2-2. T1 and analog trunk assignments, DBS 40 ....................................................... 2-5

Table 2-3. T1 and analog trunk assignments, DBS 72 ....................................................... 2-5

Table 2-4. T1 and analog trunk assignments, DBS 96 ....................................................... 2-6

Table 2-5. Maximum T1 assignments for two-cabinet systems ......................................... 2-6

Table 2-6. T1 and analog trunk assignments, DBS 40 + 40................................................ 2-7

Table 2-7. T1 and analog trunk assignments, DBS 72 + DBS 72 ...................................... 2-8

Table 2-8. T1 and analog trunk assignments, DBS 96 + DBS 40 ...................................... 2-9

Table 2-9. T1 and analog trunk assignments, DBS 96 + DBS 72 .................................... 2-10

Table 2-10. T1 and analog trunk assignments, DBS 96 + DBS 96 .................................... 2-11

Table 2-11. Switch settings for SW1 on the T1 card ......................................................... 2-18

Table 4-1. T1 alarm definitions ........................................................................................ 4-21

Table 4-2. Alarm-related programs ..................................................................................4-22

Table A-1 44-Series Phones ............................................................................................. A-1

Table A-2 Small-Display Phone Features ......................................................................... A-8

Table A-3 Large-Display Phone Features ....................................................................... A-10

Table A-4 TRS Operator Access settings ....................................................................... A-38

Revised April 2000 DBS-2.3/9.2-500 vii

viii DBS-2.3/9.2-500 Revised April 2000

About This Manual

Overview

This manual provides an overview of the DBS T1 Interface, along with
installation and programming instructions. The following table summarizes
each chapter contained in this manual.

Chapter Title Purpose

1

2

3 Quick-Start

4 Programming

A CPC-EX 1.0

B CPC-EX 2.3.2

Introduction to the
T1 Interface

Installation Provides step-by-step instructions on installing the DBS T1

Programming

Reference

Updates

Updates

Related Documents

Provides an overview of the DBS T1 Interface, plus informa­tion on pre-installation requirements.

hardware.
Summarizes the programs that are essential to T1 installation.

Contains a complete list of T1 programming commands. Each
command description includes a list of the available options
and the associated programming addresses.

Provides information on feature enhancements and software
corrections included with CPC-EX 1.0 version software.

Provides information on feature enhancements and software
corrections included with CPC-EX 2.32 version software.

For general instructions on DBS hardware installation, see Installation

(Section 300). For an introduction to DBS programming, see Programming
Guidance (Section 400).

Revised April 20 00 DBS-2.3/9.2-500 ix

x DBS-2.3/9.2-500 Revised April 2000

Chapter 1. Introduction to the T1 Interface

This chapter provides an overview of the T1 Interface. It also describes pre­installation requirements for the T1.

The following table summarizes the topics contained in this chapter.

Topic Page

Overview 1-3

Description of the T1 1-3
Framing Options 1-3
Trunk Signaling Modes 1-4
DNIS Service 1-4

Pre-Installation Requirements 1-5

Ordering T1 1-5
What You Must Purchase 1-6

Revised April 2000 DBS-2.3/9.2-500 1-1

1-2 DBS-2.3/9.2-5 00 Revised April 2000

Introduction to the T1 Interface Overview

Overview

Description of the T1

The T1 Interface is a digital trunk card that provides 24 voice channels over a
four-wire circuit.

T1 lines can be leased from local exchange carriers and long-distance
carriers.

Note: The current version of the T1 supports voice communications only.
Data can be transmitted only if it reaches the T1 in analog form. Examples of
analog data that can be transmitted over the T1 include fax transmissions or
PC files that have been converted into analog form using a modem.

Framing Options

The T1 Interface takes an 8-bit sample from each of the 24 voice channels.
These samples are grouped into 24 time slots, and each group of 24 slots is
known as a T1 frame.

Since each of the 24 time slots contains 8 bits, the number of s ampling bi ts i n
each frame equals 192 (24 x 8 = 192). In addition, a framing bit is added to
the end of each frame to mark where the frame ends. The addition of the
framing bit results in a 193-bit frame.

The T1 transmits these 193-bit frames at a rate of 8000 per second. The total
number of frames (193) multiplied by the frame speed (8000 per second)
results in a total transmission rate of 1.544 Mbps.

The T1 transmits the frames in groups of 12 or 24, depending on whether the
SF or ESF framing format is used.

SF or ESF Framing Formats

The superframe (also known as SF or D4) format transmits the sampling
frames in groups of 12. “Robbed bit signaling” is used to transmit signaling
information for the frames. With robbed bit signaling, the eighth bit of each
of the 24 samples is robbed from every sixth frame. The robbed bits transmit
signaling states such as “onhook” and “offhook.”

The extended superframe (ESF) format also uses robbed bit signaling, but
transmits the sampling frames in groups of 24. ESF supports monitoring and
maintenance capabilities that are not available with the SF format.

Revised April 2000 DBS-2.3/9.2-500 1-3

Overview

Trunk Signaling Modes

The T1 provides the following trunk signaling modes. The signaling modes
can be assigned on a per-channel basis.

• Loop start

• Ground start

•E&M

DNIS Service

The DBS T1 can be used for Dialed Number Information Service (DNIS).
DNIS is normally used when multiple 1-800 lines terminate to the same

station or group. DNIS displays the last four digits of the dialed number,
thereby allowing users to customize greetings for calls to different numbers.

Introduction to the T1 Interface

For example, an ACD group for ABC company may receive calls for sales
and service. If the 1-800 number for sales is 1-800-555-4000 and the 1-800
number for service is 1-800-555-5000, the agents will know how to answer a
ringing call by viewing their phone display. For instance, calls to the 4000
number may be answered “ABC Company--Sales Information,” while calls to
the 5000 number may be answered “ABC Company--Customer Service.”

DNIS can be assigned on a per-channel basis.

1-4 DBS-2.3/9.2-500 Revised April 2000

Introduction to the T1 Interface Pre-Installation Requirements

Pre-Installation Requirements

Use the following guidelines to prepare your site for T1 installation.

Ordering T1

The following guidelines describe T1 options that must be ordered from your
central office or interexchange carrier. These guidelines are designed to cover
almost all T1 installations. However, special requirements should be
discussed with your provider.

Table 1-1. Guidelines for ordering T1 services

Item to be Ordered Options

Line Type E&M, loop start, or ground start. For DNIS, order E&M with

wink start.

Trunk Signaling Wink start or immediate start/ringdown. Immediate start/ring-

down is used in most cases. However, if DNIS is used, order wink

start.
Signaling Code DS-1
Line Code AMI or B8ZS. AMI is used in most cases.
Framing Format D4 (Superframe) or ESF (Extended Superframe). D4 is used in

most cases.
Signaling Method In-band
Tones Order dial tone and ringback tone if provided by the CO.

Note: If the CO does not provide dial tone, program the DBS to

generate its own dial tone. See page 4-39.
DNIS Service Order E&M trunk emulation with wink start signaling.

When the central of fice se nds a DID/DNIS ca ll to the DBS, it f irst

receives a wink from the DBS before sending the digits. Once the

wink is received, the central office should wait at least 200 ms

before sending the digits. Be sure to request the delay when order-

ing DNIS.

Note: The DBS supports four-digit DNIS service only.

Revised April 2000 DBS-2.3/9.2-500 1-5

Pre-Installation Requirements

What You Must Purchase

The following items must be purchased to install T1.

DBS Equipment

If you are installing the T1 in a single-cabinet system, order the equipment
included in Table 1-2. For two-cabinet systems, see Table 1-3.

Table 1-2. T1 Hardware requirements for single-cabinet systems

Introduction to the T1 Interface

CPC-B 4.0

(VB-43411)

1

(See Note 1.)

SCC-B

(VB-43421)

1

(See Notes 2 and 3.)

T1 Trunk Card

(VB-43561)

111

T1 MDF Card

(VB-43562)

Sync Unit

(VB-43563)

Notes:

1. Version 1.3 of the Bus Processor Unit (BPU) chip is required for T1.

2. An MFR card is required for DID/DNIS if DTMF signaling is used. If DID/DNIS is
provided through DP signaling, an MFR card is not required.

3. SCC-B with ROM 1.3 or later is required if the central office does not provide T1
dial tone.

Table 1-3. T1 Hardware requirements for double-cabinet systems

T1
Location

T1 in the
Master

T1 in the
Slave

T1 in both
Master and
Slave

Notes:

CPC-B V4

(VB-43411)
(See Note 1.)

1 1 1110 1

1 11111 1

1 12211 1

SCC-B

(VB-43421)

(See Notes

2 and 3.)

T1 Trunk
Card

(VB-43561)

T1 MDF
Card

(VB-43562)

Sync
Unit

(VB-43563)

1. Version 1.3 of the Bus Processor Unit (BPU) chip is required for T1.

T1 Cable

(VB-43564)

Cable Kit

(VB-43110)
(See Note 4.)

2. An MFR card is required for DID/DNIS if DTMF signaling is used. If DID/DNIS is provided through DP
signaling, an MFR card is not required.

3. SCC-B with ROM 1.3 or later is required if the central office does not provide T1 dial tone.

4. Version 1.2 of the Cable Kit is required for T1.

1-6 DBS-2.3/9.2-500 Revised April 2000

Introduction to the T1 Interface Pre-Installation Requirements

CSU Equipment

The installer must provide a Channel Service Unit (CSU) plus CSU cabling.
The CSU equipment must meet the specifications contained in T able 1-4. See

page 2-12 for instructions on installing the CSU.

Table 1-4. CSU equipment required for T1

Item Specifications Vendors

CSU The Channel Service Unit (CSU) must comply with

FCC Part 15 and Part 68. The CSU is installed
between the DBS and the publ ic networ k. The C SU
provides alarm, diagnostic, and monitoring func­tions, as well as network protection.

The following CSUs have been used successfully
with the DBS T1.

Kentrox

For the D4 framing format:
Kentrox T-SERV II

For the D4 or ESF framing format:
Kentrox T-SMART
(Kentrox can be contacted at 1-800-733-5511.)





CSU
Cabling

Each CSU requires a network cable and an equip­ment cable. The network cable connects from the
CSU to the network interface. The equipment cable
connects from the CSU to the DBS T1 MDF card.

For Kentrox CSUs

The network cable requires a female DB-15 con­nector and an RJ48C connector. The equipment
cable requires a male DB-15 connector and an
RJ48C connector.

To simplify installation, you can order the prefabri­cated cables shown in the “Vendors” column.

If you fabricate your o wn T1 cables, you shou ld use
24 AWG stranded cable that includes shielding for
each pair. For best results, use the cable listed un der
“Vendors.”

For Premier CSUs

You must fabricate your own cables for the Premier
CSU. The network cable requires two RJ48C con­nectors. The equipment cable connects to an RJ48C
connector on the T1 MDF card and to four screw­down terminals on the CSU.

For both cables, use 24 AWG stranded cable that
includes shielding for each pair. For best results,
use the cable listed under “Vendors.”

Premier

For the D4 or ESF format:
Premier PT-3000-01
(Premier is manufactured by U.S. Sprint. Sprint
can be contacted at 1-800-791-1110.)

For Kentrox CSUs

Kentrox offers prefabricated cables f or their CSUs.
For the network cable, order part number 01-

93010151. For the equipment cable, order part
number 01-93010121.
If you fabricate your own cables, use 24 AWG
stranded cable that includes shielding for each pair.

Belden (Richmond, IN) offers stranded cable that
complies with these specifications. Order part
number 8723.

For Premier CSUs

Belden (Richmond, IN) offers stranded cable that
complies with our specifications. Order part num­ber 8723.



Revised April 2000 DBS-2.3/9.2-500 1-7

1-8 DBS-2.3/9.2-5 00 Revised April 2000

Chapter 2. Installation

This section describes guidelines and procedures for installing the T1
Interface. Once the T1 is installed, refer to “Quick-Start Programming” on
page 3-1 for programming instructions.

This chapter covers the following topics:

Topic Page

Guidelines 2-3

Hardware Requirements 2-3
Maximums 2-3
Trunk Assignments for Single-Cabinet Systems 2-5
Trunk Assignments for Double-Cabinet Systems 2-6

Installation Procedures 2-12

Installing the CSU 2-12
Installing a T1 in a Single Cabinet 2-14
Installing T1 in a Double Cabinet with the T1 in the Slave 2-21
Installing T1 in a Double Cabinet with the T1 in the Slave 2-21

Revised April 2000 DBS-2.3/9.2-500 2-1

2-2 DBS-2.3/9.2-5 00 Revised April 2000

Installation Guidelines

Guidelines

Read the following guidelines before beginning T1 installation. Installation
instructions begin on page 2-14.

Hardware Requirements

• The system configuration determines what cards and cables must be
purchased for T1. See “DBS Equipment” on page 1-6 for more
information.

• The installer must provide a Channel Service Unit (CSU) that complies
with FCC Part 15 and Part 68. The CSU is installed between the DBS and
the public network. The CSU provides alarm, diagnostic, and monitoring
functions, as well as network protection.

See “CSU Equipment” on page 1-7 for details on purchasing CSUs.

Maximums

• One T1 card can be installed per cabinet; the T1 card must be installed in
the “EC/TRK” slot.

• The number of T1 cards that can be installed in two-cabinet systems
depends on the sizes of the connected systems. Table 2-1 shows T1
maximums for two-cabinet systems.

Note: The DBS 72 + DBS 40 combination does not support T1.

Table 2-1. EC/TRK slot usage for T1

System Size EC/TRK Slot

Usage for T1
Master Slave

DBS 40 + DBS 40 No Yes
DBS 72 + DBS 40 No No
DBS 72 + DBS 72 No Yes
DBS 96 + DBS 40 Yes Yes
DBS 96 + DBS 72 Yes Yes
DBS 96 + DBS 96 Yes Yes

Revised April 2000 DBS-2.3/9.2-500 2-3

Guidelines

Installation

• Fractional T1 can be used when fewer than 24 T1 trunks are needed.
Fractional T1 allows you to use only a portion of the 24 channels provided
on the T1 card.

• Though each T1 Interface provides 24 trunk channels, T1 trunks do not
increase the overall trunk capacity of the DBS. Each T1 channel subtracts
from the total number of analog trunks that can be installed. Furthermore,
the number of analog trunks that can be used are always decremented in
quantities of 8.

For instance, if you’re installing a T1 in a DBS 96 and you only want to
use 12 T1 channels, the logical number of analog trunks that would be
available is 20 (32 - 12 = 20).

However, because the number of analog trunks must be decremented in
quantities of 8, the actual number of analog trunks that can be used is 16:

(32 total trunks - 16 (two 8-trunk increments) = 16.)
Tables 2-2 through 2-4 show the possible combinations of analog and

digital trunks assignments based on system size.
The trunk numbering shown in these tables is determined by backplane

trunk port assignments. Therefore, the numbering cannot be changed.
Note: Analog trunks are numbered beginning with “1.” T1 trunk channels

are numbered beginning with the highest trunk channel used.

2-4 DBS-2.3/9.2-500 Revised April 2000

Installation Guidelines

Trunk Assignments for Single-Cabinet Systems

• Programming is not required to associate trunk ports with slot locations.
However, you must use programming to specify that a combination of T1
and analog trunks is installed, and you must also specify how many T1
channels are used.

Table 2-2. T1 and analog trunk assignments, DBS 40

Trunk
Number

1 T1 channel 16 Analog trunk 1

↓↓ ↓

8 T1 channel 9 Analog trunk 8
9 T1 channel 8 T1 channel 8

↓↓ ↓

16 T1 channel 1 T1 channel 1

Note: Since the DBS 40 supports a maximum of 16 trunks,
all 24 channels of the T1 cannot be used.

Table 2-3. T1 and analog trunk assignments, DBS 72

Trunk
Number

1 T1 channel 24 Analog trunk 1 Analog trunk 1

↓↓ ↓ ↓

8 T1 channel 17 Analog trunk 8 Analog trunk 8

24-Channel T1 Fractional T1

Fractional T1
using 16 Channels

using 16 Channels

Fractional T1
using 8 Channels

Fractional T1
using 8 Channels

9 T1 channel 16 T1 channel 16 Analog trunk 9

↓↓ ↓ ↓

16 T1 channel 9 T1 channel 9 Analog trunk 16
17 T1 channel 8 T1 channel 8 T1 channel 8

↓↓ ↓ ↓

24 T1 channel 1 T1 channel 1 T1 channel 1

Revised April 2000 DBS-2.3/9.2-500 2-5

Guidelines

Table 2-4. T1 and analog trunk assignments, DBS 96

Installation

Trunk
Number

1 Analog trunk 1 Analog trunk 1 Analog trunk 1

↓↓ ↓ ↓

8 Analog trunk 8 Analog trunk 8 Analog trunk 8
9 T1 channel 24 Analog trunk 9 Analog trunk 9

↓↓ ↓ ↓

16 T1 channel 17 Analog trunk 16 Analog trunk 16
17 T1 channel 16 T1 channel 16 Analog trunk 17

↓↓ ↓ ↓

24 T1 channel 9 T1 channel 9 Analog trunk 24
25 T1 channel 8 T1 channel 8 T1 channel 8

↓↓ ↓ ↓

32 T1 channel 1 T1 channel 1 T1 channel 1

24-Channel T1 Fractional T1

using 16 Channels

Fractional T1
using 8 Channels

Tru nk Assignments for Double-Cabinet Systems

• When T1 is used in a two-cabinet system, the number of T1 channels that
can be assigned in each cabinet depends on the master/slave designation.

The following table shows the maximum number of T1 channels that can
be assigned in two-cabinet systems.

Table 2-5. Maximum T1 assignments for two-cabinet systems

System Size Master Slave

DBS 40 + DBS 40 8 analog trunks 16 T1 trunks
DBS 72 + DBS 72 16 analog trunks 24 T1 trunks
DBS 96 + DBS 40 24 T1 trunks

8 analog trunks

DBS 96 + DBS 72 24 T1 trunks

8 analog trunks

DBS 96 + DBS 96 24 T1 trunks

8 analog trunks

16 T1 trunks

24 T1 trunks

24 T1 trunks
8 analog trunks

2-6 DBS-2.3/9.2-500 Revised April 2000

Installation Guidelines

• Two-cabinet systems use the same trunk numbering scheme as single­cabinet systems: analog trunks are numbered from “1” upward; T1 trunk
channels are numbered downward from the highest channel used.

Tables 2-6 through 2-10 show trunk numbering for two-cabinet systems
using the maximum number of T1 channels.

Table 2-6. T1 and analog trunk assignments, DBS 40 + 40 (16-channel fractional T1 in the slave)

Trunk

Master Cabinet Slave Cabinet

Number

1 Analog trunk 1

↓↓ Ν/Α

8 Analog trunk 8
9 T1 channel 16

↓ N/A ↓

16 T1 channel 9
17 T1 channel 8

↓Ν/Α ↓

24 T1 channel 1

Revised April 2000 DBS-2.3/9.2-500 2-7

Guidelines

Table 2-7. T1 and analog trunk assignments, DBS 72 + DBS 72 (24-channel T1 in the slave)

Installation

Trunk

Master Cabinet Slave Cabinet

Number

1 Analog trunk 1

↓↓ Ν/Α

8 Analog trunk 8
9 Analog trunk 9
↓↓ N/A

16 Analog trunk 16
17 T1 channel 24

↓Ν/Α ↓

24 T1 channel 17
33 T1 channel 16

↓Ν/Α ↓

40 T1 channel 9
41 T1 channel 8

↓Ν/Α ↓

48 T1 channel 1

2-8 DBS-2.3/9.2-500 Revised April 2000

Installation Guidelines

Table 2-8. T1 and analog trunk assignments, DBS 96 + DBS 40 (24-channel T1 in the master; 16-

channel T1 in the slave)

Trunk

Master Cabinet Slave Cabinet

Number

1 Analog trunk 1

↓↓ Ν/Α

8 Analog trunk 8
9 T1 channel 24
↓↓ N/A

16 T1 channel 17
17 T1 channel 16

↓↓ Ν/Α

24 T1 channel 9
25 T1 channel 8

↓↓ Ν/Α

32 T1 channel 1
33 T1 channel 16

↓Ν/Α ↓

40 T1 channel 9
41 T1 channel 8

↓Ν/Α ↓

48 T1 channel 1

Revised April 2000 DBS-2.3/9.2-500 2-9

Guidelines

Table 2-9. T1 and analog trunk assignments, DBS 96 + DBS 72 (24-channel T1 in the master; 24-

channel T1 in the slave)

Installation

Trunk

Master Cabinet Slave Cabinet

Number

1 Analog trunk 1

↓↓ Ν/Α

8 Analog trunk 8
9 T1 channel 24
↓↓ N/A

16 T1 channel 17
17 T1 channel 16

↓↓ Ν/Α

24 T1 channel 9
25 T1 channel 8

↓↓ Ν/Α

32 T1 channel 1
33 T1 channel 24

↓Ν/Α ↓

40 T1 channel 17
41 T1 channel 16

↓Ν/Α ↓

48 T1 channel 9
49 T1 channel 8

↓Ν/Α ↓

56 T1 channel 1

2-10 DBS-2.3/9.2-500 Revised April 2000

Installation Guidelines

Table 2-10. T1 and analog trunk assignments, DBS 96 + DBS 96 (24-channel T1 in the master; 24-

channel T1 in the slave)

Trunk

Master Cabinet Slave Cabinet

Number

1 Analog trunk 1

↓↓ Ν/Α

8 Analog trunk 8
9 T1 channel 24
↓↓ N/A

16 T1 channel 17
17 T1 channel 16

↓↓ Ν/Α

24 T1 channel 9
25 T1 channel 8

↓↓ Ν/Α

32 T1 channel 1
33 Analog trunk 1

↓Ν/Α ↓

40 Analog trunk 8
41 T1 channel 24

↓Ν/Α ↓

48 T1 channel 17
49 T1 channel 16

↓Ν/Α ↓

56 T1 channel 9
57 T1 channel 8

↓Ν/Α ↓

64 T1 channel 1

Revised April 2000 DBS-2.3/9.2-500 2-11

Installation Procedures

Installation

Installation Procedures

The following procedures provide step-by-step instructions for installing the
CSU and the T1 Interface. The T1 procedure that you should use depends on
the type of system you have and the number of T1s you are installing.

If you’re installing ... Use this procedure...

A T1 in a single cabinet “Installing a T1 in a Single Cabinet” (page 2-14)
One T1 in a double cabinet, with the T1 located in

the master
One T1 in a double cabinets, with the T1 located in

the slave
T1s in both the master and slave “Installing a T1 in a Double Cabinet with T1s in

“Installing a T1 in a Single Cabinet” (page 2-14)

“Installing a T1 in a Double Cabinet with the T1
in the Slave” (page 2-21)

the Master and Slave” (page 2-21)

Installing the CSU

The following instructions explain how to install the CSU. See “CSU
Equipment” on page 1-7 for specifications on CSUs and CSU cabling.

Note: The CSU should be powered locally, not through the CO line. Also,
the CSU should be connected to an Uninterruptible Power Supply (UPS) to
provide battery backup in case of AC power failures.

1. Connect the equipment cable from the DBS T1 MDF card to the
equipment side of the CSU, as shown in Figure 2-1.

Figure 2-1. CSU installation

Network
Demarcation

Network
Cable

To the T1
MDF Card

CSU

DBS

Equipment
Cable

2-12 DBS-2.3/9.2-500 Revised April 2000