Avaya Definity SI, Maintenance Manual, Page: 1452 / 2968

Maintenance Object Repair Procedures
555-233-123 10-666 Issue 4 May 2002
CSU Equipment Loopback Test (#1210)
This test is destructive.
The CSU Equipment Loopback (ELB) Test causes a loopback at the near-edge of
the local 120A CSU Module or T1 Sync Splitter, and tests the connection from the
TN767E 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 1.544Mbps TN767E DS1 circuit pack on the back of the port
carrier.
FAIL DS1 Interface circuit pack failed the DS1 Board Loopback Test.
1. Retry test ds1-loop UUCSS ds1/csu-loopback-tests.
2. If the BLB test continues to fail, then replace the DS1 circuit
pack.
PASS The BLB test executed successfully. The test pattern was
transmitted and received successfully up to the TN767E DS1
board edge.
0 NO
BOARD The test could not relate the internal ID to the port (no board).
This could be due to incorrect translations, no board is inserted,
an incorrect board is inserted, or an insane board is inserted.
1. Check to ensure that the board translations are correct. Use
the add ds1 UUCSS command to administer the DS1
interface if it is not already administered.
2. If board was already administered correctly, check the error
log to determine if the board is hyperactive. If this is the
case, the board is shut down. Reseating the board will
re-initialize the board.
3. If the board was found to be correctly inserted in step 1,
issue the busyout board command.
4. Issue the reset board command.
5. Issue the release busy board command.
6. Issue the test board long command.
This should re-establish the link between the internal ID and the
port.
Table 10-244. TEST #1209 DS1 Board Loopback Test — Continued
Error
Code Test
Result Description/Recommendation
Continued on next page