Avaya S8700 Maintenance Manual page 1352

Maintenance-Object Repair Procedures
DS1 Board Loop-Back Test (#1209)
This test is destructive.
The DS1 BLB (Board Loopback) test causes a loop back at the TN767E DS1
board edge and tests DS1 board internal circuitry.
The test is destructive and can only be initiated by a technician-demanded
test ds1-loop UUCSS ds1/csu-loopback-tests command.
All trunks or ports on the DS1 Interface circuit pack must be busied out via the
system technician busyout board command before running the BLB test.
When the BLB test is initiated, maintenance software sends an appropriate
message to the TN767E DS1 Interface circuit pack to start the test. The board will
set up the BLB 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.
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 8-254. Test #1209 DS1 Board 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 DS1 Board Loopback test cannot be executed in the current configuration. To
run this test, the TN767E (or higher-suffixed) DS1 must be administered for
24-channel operation. The
administration form must be set to "1.544" for 24-channel operation.
1015 ABORT Ports on the DS1 Interface circuit pack have not been busied out to
out-of-service.
1. Enter busyout board UUCSS to put all trunks or ports of the DS1 Interface
2. Retry the command.
8-630 Issue 1 May 2002
intervals up to 5 times.
Bit Rate
circuit pack into the out-of-service state.
field on the DS1 circuit pack
Continued on next page
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