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61200261L1-1 ATLAS Quad USSI Module User Manual 1-1

Chapter 1 Introduction

ATLAS QUAD USSI MODULE OVERVIEW

The ATLAS Quad USSI Module provides four synchronous DTE ports, each

of which can operate at any rate that is a multiple of 56 or 64 kbps, up to

2.048 Mbps. You can install the ATLAS Quad USSI Module into any avail-

able option slot of the ATLAS_800 chassis.

Features

• Each port operates using 1 to 32 time slots, each time slot being 56 or 64

kbps

• Includes an elastic store for absorption of rate variations

• Any port can be used as a timing source for the entire system

• Outputs a 50 percent duty-cycle output clock at all rates

• Generates and responds to V.54 looping codes

• Generates and checks 511 test patterns

• Bidirectional loopbacks:

- Port (toward the network)

- DTE (toward the DTE)

Interfaces

• EIA-530

• EIA-530A

•RS-449

•RS-232

• CCITT X.21 (V.11)

• Connector: DB-78

(DB-78 to Dual D sub connector adapter cables ship with this module.)

You can invoke loopbacks locally or remotely (V.54).

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ADTRAN ATLAS 800 SERIES Manual do Utilizador Página 11