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Demand test descriptions and error codes - Avaya Support

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UDS1-BD (UDS1 Interface Circuit Pack)<br />

The Enhanced Integrated CSU is for use in the United States of America with 1.544-Mbps DS1<br />

service. For further details on the 120A1 CSU module refer to Installing <strong>and</strong> Operating a 120A<br />

Chel Service Unit with <strong>Avaya</strong> Communication Manager (03-601508).<br />

The UDS1-BD <strong>and</strong> 120A1 CSU module support on-dem<strong>and</strong> loopback <strong>test</strong>s that assist in the<br />

detection of faults between the UDS1-BD circuit pack <strong>and</strong> the CSU module, between the<br />

Integrated CSU <strong>and</strong> the optional Customer Premises Loopback Jack, or between the Integrated<br />

CSU <strong>and</strong> remote CSU.<br />

Figure 92: High Level Overview Of Loopback Points gives a high level overview of the<br />

loopback points.<br />

Figure 92: High Level Overview Of Loopback Points<br />

PLB<br />

DS1<br />

BRD<br />

DS1<br />

BOARD<br />

NETWORK<br />

SMRT<br />

JACK<br />

BLB<br />

CSU<br />

MOD<br />

The following list of acronym definitions are for the Figure 92: High Level Overview Of<br />

Loopback Points:<br />

● PLB = Payload Loopback<br />

● BLB = Board Loopback<br />

● ELB = Equipment Loopback<br />

● LLB = Line Loopback<br />

Local end<br />

● RLB = Repeater Loopback<br />

CPE<br />

LPBK<br />

JACK<br />

● CLJ = CPE Loopback Jack<br />

ELB<br />

● R-LLB = Remote Line Loopback<br />

NET<br />

SMRT<br />

JACK<br />

CSU<br />

MOD<br />

LLB RLB<br />

CPE<br />

LPBK<br />

JACK<br />

NETWORK ENVIRONMENT<br />

NET-<br />

WORK<br />

CSU module to CSU module<br />

Local end loop backs<br />

NET<br />

SMRT<br />

JACK<br />

CPE<br />

LPBK<br />

JACK<br />

CSU*<br />

MOD<br />

R-LLB<br />

CLJ-LB<br />

CPE<br />

LPBK<br />

JACK<br />

Remote end<br />

CSU<br />

MOD<br />

DS1<br />

BRD<br />

NETWORK<br />

SMRT<br />

JACK<br />

DS1<br />

BOARD<br />

Issue 5 May 2009 1023

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