61200.055L1-1C
DSX-1 Passthru Option Module
3
Chapter 1. Introduction
Line codes
AMI
Bipolar return to zero (B8ZS)
Framing options
ESF per ANSI T1.403 and AT&T
Publication TR 54016
D4 per AT&T Publication 62411
Line length
up to 655 ft. in 110 ft. steps
Clock source
allows PBX to be master timing
source
Tests
power-on circuit self test
line loopback
port loopback (internal toward Mux)
Connectors
DB15 (female)
RJ45C
PHYSICAL DESCRIPTION
The Passthru is an option module which plugs into the
option slot in the rear of the TSU 100/600
.
See Figure 1-1.
PASS THRU
PORT X.1
NX 56/64
PORT X.2
V.35
DSX-1
Figure 1-1
DSX-1 Passthru Option Module
The Passthru rear panel includes a plastic plug over a
cutout for a V.35 connector. This allows a V.35 Nx56/64
interface plug-on card to be added to the Passthru card,
part number 1200053L1. The PORT X.1 identification
on the rear panel is linked to the port numbering
philosophy of the TSU 100/600 product family. The X
