Avaya S8700 Maintenance Manual page 1356

Maintenance-Object Repair Procedures
When the ELB test is initiated, maintenance software sends an appropriate
message to the TN767E DS1 Interface circuit pack to start the test. The board
sets up the ELB loop back, transmit a test pattern, and verify that the pattern is
received unaltered through the loop back. If the transmitted and received pattern
is different, the test fails.
In addition, 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
loop-back pattern.
When the test is complete, all trunks or ports on the TN767E DS1 Interface circuit
pack are restored to the in-service state after the release board command is
entered.
Table 8-255. Test #1210 CSU Equipment Loop-Back Test
Error Test
Code Result Description / Recommendation
ABORT Internal system error
1. Retry test ds1-loop UUCSS ds1/csu-loopback-tests at 1-minute
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 form must be set to integrated and the
set to "1.544" (for 24-channel operation).
1. Use the change ds1 UUCSS command to set the Near-End CSU Type
2. Retry test ds1-loop UUCSS ds1/csu-loopback-tests.
1015 ABORT Ports on the DS1 Interface circuit pack have not been busied out to
out-of-service.
1. Enter the busyout board UUCSS command to put all trunks or ports of the
2. Retry the command.
1039 ABORT The DS1 Interface circuit pack is providing timing for the system. Executing
this test could cause major system disruption.
If the DS1 Interface circuit pack needs to be tested, set the synchronization
reference to another DS1 Interface circuit pack or to the Tone-Clock circuit via
the following command sequence:
1. Issue the disable synchronization-switch command.
2. Next, issue the set synchronization UUCSS command.
3. Lastly, issue the enable synchronization-switch command.
8-634 Issue 1 May 2002
intervals up to 5 times.
field on the DS1 circuit pack administration form to integrated, and/or
change the field to "1.544" if the board is to be used in a
Bit Rate
24-channel configuration.
DS1 Interface circuit pack into the out-of-service state.
field must be
Bit Rate
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