Avaya S8700 Maintenance Manual page 582

Maintenance Object Repair Procedure
DS1 Board Loop-back Test (#1209)
This test is destructive.
The DS1 BLB (Board Loopback) test causes a loop back at the DS1 board edge
and tests DS1 board internal circuitry.
The test is destructive and can only be initiated by a system technician demanded
test ds1-loop UUCSS ds1/csu-loopback-tests command.
Every trunk or port on the UDS1 Interface circuit pack must be busied out using
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 UDS1 Interface circuit pack to start the test. The board sets up
the BLB 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, every trunk or port on the TN464GP/TN2464BPTN
UDS1 Interface circuit pack is restored to the in-service state after the release
board command is entered.
Table 8-535. Test #1209 DS1 Board Loop-Back Test
Error Test
Code Result Description / Recommendation
ABORT Internal system error
1. Retry the test ds1-loop UUCSS ds1/csu-loopback-tests command at
1005 ABORT DS1 Board Loopback test cannot be executed in the current configuration. To
run this, the TN464F or later suffix UDS1 must be administered for 24-channel
operation. The "Bit Rate" field on the DS1 circuit pack administration form must
be set to "1.544" for 24-channel operation.
1015 ABORT Ports on the UDS1 Interface circuit pack have not been busied out to
out-of-service.
1. Enter the busyout board UUCSS command to put every trunk or port of
2. Retry the command.
8-1278 Issue 1 May 2002
1-minute intervals up to 5 times.
the UDS1 Interface circuit pack into the out-of-service state.
Continued on next page
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