Avaya 03-300430 User Manual
Communication Manager Maintenance-Object Repair Procedures
2452 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
CSU Repeater Loop-Back Test (#1211)
This test is destructive.
The CSU Repeater Loopback (RLB) test causes a loopback at the far-edge of the local 120A1
CSU module or the 401A T1 sync splitter and tests the connection from the DS1 board up to
and including the CSU module/T1 sync splitter circuitry. This test is only performed if the 120A1
CSU module or the 401A 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 test ds1-loop location ds1/
csu-loopback-tests.
Each trunk or port on the UDS1 Interface circuit pack must be busied out using busyout
board location before running the RLB test.
When the RLB test is initiated, maintenance software sends an appropriate message to the
UDS1 Interface circuit pack to start the test. The board sets up the RLB 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.
When the test is complete, each trunk or port on the UDS1 Interface circuit pack is restored to
the in-service state after release board location is entered.
The CSU Repeater Loopback (RLB) test causes a loopback at the far-edge of the local 120A1
CSU module or the 401A T1 sync splitter and tests the connection from the DS1 board up to
and including the CSU module/T1 sync splitter circuitry. This test is only performed if the 120A1
CSU module or the 401A 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 test ds1-loop location ds1/
csu-loopback-tests.
Each trunk or port on the UDS1 Interface circuit pack must be busied out using busyout
board location before running the RLB test.
When the RLB test is initiated, maintenance software sends an appropriate message to the
UDS1 Interface circuit pack to start the test. The board sets up the RLB 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.
When the test is complete, each trunk or port on the UDS1 Interface circuit pack is restored to
the in-service state after release board location is entered.
Table 869: Test #1211 CSU Repeater Loop-Back Test
Error
Code
Code
Test
Result
Result
Description / Recommendation
ABRT
Internal system error
1. Retry test ds1-loop location ds1/csu-loopback-tests at
1-minute intervals up to 5 times.
1005
ABRT
CSU Repeater 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 on the DS1 Circuit Pack administration screen must be set to
1.544 (24-channel configuration).
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 on the DS1 Circuit Pack administration screen must be set to
1.544 (24-channel configuration).
1. Use change ds1 location to set the Near-End CSU Type field on
the DS1 Circuit Pack administration screen to integrated, and/or
change the Bit Rate field to 1.544 if the board is to be used in
24-channel configuration.
change the Bit Rate field to 1.544 if the board is to be used in
24-channel configuration.
2. Retry test ds1-loop location ds1/csu-loopback-tests.
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