ADTRAN TRACER 2xT1, User Manual

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TRACER 2xT1 User’s Manual
61280003L2-1B
Section 2 Installation
14 Preliminary
DS1/DSX-1 Interface
The rear panel of the TRACER has two sets of jacks labeled T1A and T1B which provide the same
functionality. The pin assignments for the eight-position modular jack are listed below.
Pin Name Function
1 ................ R ....................... Send data (ring)
2 ................ T ....................... Send data (tip)
3 ........................................... Not used
4 ................ R1 ..................... Receive data (ring)
5 ................ T1 ..................... Receive data (tip)
6 ........................................... Not used
7 ........................................... Not used
8 ........................................... Not used
Bantam jack connections are provided for test equipment access. Data is received on the jack labelled
“IN” and is transmitted on the jack labelled “OUT.” Bantam jacks are provided for both inserting and
monitoring the interfaces. When a plug is placed in the insert jack, the connection between the modular
jack and the interface circuitry is broken. The monitor jacks provide access to monitor the transmitted
and received signals without interference.
When connecting either T1 interface to the public switched network, an ADTRAN-provided crossover
cable (part number 3125M011@A) is required to meet FCC part 68 and IC CS03 requirements. This
cable is required to cross-over the Tx and Rx pairs to meet the connecting arrangement of a network
interface device. This cable, labelled “T1 Crossover,” is included with the BBP.
For connections to other CPE-type equipment, such as an ADTRAN TSU, a straight-through T1 cable
(ADTRAN part number 3127004) is included with the BBP.
Each DS1/DSX-1 interface must be configured for line code and framing, either from the front-panel
rocker switches or via the VT-100 terminal. The choices for line code are AMI and B8ZS. The options
for framing are SF and ESF. Each channel can be configured independently of the other and should be
configured to match the attached T1 equipment.
The line build-out (LBO) must be set for each DS1/DSX-1 interface. The LBO setting allows each
DS1/DSX-1 interface transmitter to drive the interface with the correct signal strength based on the line
attenuation between TRACER and the attached equipment. The LBO is independently set for each
interface via rotary switches on the front panel. Two sets of configurations are provided -- DSX-1 for
short-haul interface (less than 655 feet) and DS1 for long-haul interfaces (greater than 655 feet). The
settings are detailed below.
Interface Type LBO Switch Setting
DSX-1 .......................... 0-133 feet ................... 2, 3
DSX-1 ........................ 133-266 feet ................... 4
DSX-1 ............................ 266-399 ....................... 5
DSX-1 ............................ 399-533 ....................... 6
DSX-1 ........................ 533-655 feet ................... 7
DS1 .................................... 0 dB .......................... 8
DS1 ................................. -7.5 dB ........................ 9
DS1 .................................. -15 dB ....................... 10
DS1 ................................ -22.5 dB ...................... 11