Server Alarms - Avaya Support

Communication Manager Maintenance Object Repair Procedures
The CSU ELB (Equipment Loopback) test causes a loopback at the near-edge of the local 120A
CSU module or T1 sync splitter, and tests the connection from the DS1 board to the CSU
module/T1 sync splitter (DS1 board edge interconnecting cable, and CSU module/T1 sync
splitter edge). This test will only be performed if the 120A CSU module/T1 sync splitter is
present, administered, and connected to a 1.544-Mbps DS1 circuit pack on the back of the port
carrier.
The test is destructive and can only be initiated by entering the command
test ds1-loop location ds1/csu-loopback-tests.
Enter busyout board to busy out all trunks or ports on the DS1 Interface circuit pack before
running the ELB test.
When the ELB test is initiated, maintenance software sends a message to the DS1 Interface
circuit pack to start the test. The board sets up the ELB loopback, transmits a test pattern, and
verifies that the pattern is received unaltered through the loopback. If the transmitted and
received pattern is different, the test fails.
The DS1 circuit pack hardware applies a DC current while the test is running in order to detect
any broken wires that may not be detected by the loopback pattern.
When the test is complete, enter release board to restore all trunks or ports on the DS1
Interface circuit pack to the in-service state.
This test is run on the DS1-BD (DS1 Interface Circuit Pack) and UDS1-BD (UDS1 Interface
Circuit Pack) maintenance objects.
Table 578: CSU Equipment Loopback Test (#1210) 1 of 3
Error
Code
Test
Result
Description / Recommendation
ABORT Internal system error
1. Enter test ds1-loop location ds1/csu-loopback-tests
at 1-minute intervals up to 5 times.
1005 ABORT CSU Equipment Loopback test cannot be executed in the current
configuration. To run this test, the Near-End CSU Type field on the
DS1 circuit pack administration screen must be set to integrated and the
Bit Rate field must be set to “1.544” (for 24-channel operation).
1. Enter change ds1 location and set the Near-End CSU Type
field on the DS1 circuit pack administration screen to integrated,
and/or set the Bit Rate field to 1.544 if the board is to be used in a
24-channel configuration.
2. Retry test ds1-loop location ds1/csu-loopback-tests.
1928 Maintenance Alarms for Avaya Communication Manager, Media Gateways and Servers
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