Specifications

Physical Description 1-1
Chapter 1
Overview
1.1 Introduction
Purpose
This manual describes the technical characteristics, application, installation, and
operation of the D8E1T1 used in the DXC-100 Multiservice Access Node. D8E1T1
is an 8-port E1/T1 module that supports up to eight E1 or T1 links, in any
combination, with D4 (SF), ESF or G.70x framing and AMI, B8ZS or HDB3 line
coding. The module has integral BERT and supports loopback diagnostics.
10:1 hardware redundancy is available via the DXC-100PSX unit.
Main Features
D8E1T1 simultaneously terminates both DS1 (T1) and E1 and associated framing
signals on the same card, providing a cost-effective method for performing A-law
to µ-law conversion. D4 and ESF framing modes are supported for T1 links. CRC
and CAS framing modes are supported for E1 links. N+1 redundancy is supported
for critical links.
D8E1T1 has extensive statistic gathering capability. Each of the T1/E1 framers can
report sync status, frame errors, CRC errors, frame slips, and several link alarm
conditions. Diagnostics include integral BERT and loopback diagnostics for in-
network testing. For voice applications, call processing ABCD signaling bits can be
monitored.
Software Updates
For software update procedures, refer to the Utilities chapter of the DXC-100
Installation and Operation Manual.
1.2 Physical Description
D8E1T1 Module Set, General
D8E1T1 occupies a single backplane slot in the DXC-100 chassis. The D8E1T1
module set has two circuit card modules: an application module and an interface
module. The application module (front card) contains the backplane, switching,
and framing logic. The interface module (rear card) provides electrical interface via
a 50-pin RJ-48M (50-Pin telco) connector.