Demand test descriptions and error codes - Avaya Support
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Demand test descriptions and error codes - Avaya Support

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Maintenance <strong>Dem<strong>and</strong></strong> Tests<br />

The CSU ELB (Equipment Loopback) <strong>test</strong> causes a loopback at the near-edge of the local 120A<br />

CSU module or T1 sync splitter, <strong>and</strong> <strong>test</strong>s the connection from the DS1 board to the CSU<br />

module/T1 sync splitter (DS1 board edge interconnecting cable, <strong>and</strong> CSU module/T1 sync<br />

splitter edge). This <strong>test</strong> will only be performed if the 120A CSU module/T1 sync splitter is<br />

present, administered, <strong>and</strong> connected to a 1.544-Mbps DS1 circuit pack on the back of the port<br />

carrier.<br />

The <strong>test</strong> is destructive <strong>and</strong> can only be initiated by entering the comm<strong>and</strong><br />

<strong>test</strong> ds1-loop location ds1/csu-loopback-<strong>test</strong>s.<br />

Enter busyout board to busy out all trunks or ports on the DS1 Interface circuit pack before<br />

running the ELB <strong>test</strong>.<br />

When the ELB <strong>test</strong> is initiated, maintenance software sends a message to the DS1 Interface<br />

circuit pack to start the <strong>test</strong>. The board sets up the ELB loopback, transmits a <strong>test</strong> pattern, <strong>and</strong><br />

verifies that the pattern is received unaltered through the loopback. If the transmitted <strong>and</strong><br />

received pattern is different, the <strong>test</strong> fails.<br />

The DS1 circuit pack hardware applies a DC current while the <strong>test</strong> is running in order to detect<br />

any broken wires that may not be detected by the loopback pattern.<br />

When the <strong>test</strong> is complete, enter release board to restore all trunks or ports on the DS1<br />

Interface circuit pack to the in-service state.<br />

This <strong>test</strong> is run on the DS1-BD (DS1 Interface Circuit Pack) <strong>and</strong> UDS1-BD (UDS1 Interface<br />

Circuit Pack) maintenance objects.<br />

Table 483: CSU Equipment Loopback Test (#1210) 1 of 3<br />

Error<br />

Code<br />

Test<br />

Result<br />

Description / Recommendation<br />

ABORT Internal system <strong>error</strong><br />

1. Enter <strong>test</strong> ds1-loop location ds1/csu-loopback-<strong>test</strong>s<br />

at 1-minute intervals up to 5 times.<br />

1005 ABORT CSU Equipment Loopback <strong>test</strong> cot be executed in the current<br />

configuration. To run this <strong>test</strong>, the Near-End CSU Type field on the<br />

DS1 circuit pack administration screen must be set to integrated <strong>and</strong> the<br />

Bit Rate field must be set to “1.544” (for 24-chel operation).<br />

1. Enter change ds1 location <strong>and</strong> set the Near-End CSU Type<br />

field on the DS1 circuit pack administration screen to integrated,<br />

<strong>and</strong>/or set the Bit Rate field to 1.544 if the board is to be used in<br />

a 24-chel configuration.<br />

2. Retry <strong>test</strong> ds1-loop location ds1/<br />

csu-loopback-<strong>test</strong>s.<br />

1580 Maintenance Alarms for Communication Manager, Media Gateways <strong>and</strong> Servers<br />

1 of 3

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