ADTRAN TRACER User Manual page 30

P 20
AGE
S 2
ECTION
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
3125.M011@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-100, a straight-through T1 cable (ADTRAN part
number 3127.004) 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
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
LBO
61280.003L1-1B
Switch
Setting
4/12/99