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Communication Manager Maintenance-Object Repair Procedures
1038 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
Far CSU Loop-Back Test (#1213)
This test is destructive.
The Far CSU Loopback (R-LLB) test causes a loop back at the far-end CSU, and tests all
circuitry and facilities from the local TN767E DS1 board to the far-end CSU.
The test is destructive and can only be initiated by a technician-demanded test ds1-loop
location far-csu-loopback-test-begin.
Use busyout board to busy out all trunks or ports on the DS1 Interface circuit pack before
running the Far CSU Loopback test.
If the far-end CSU is not a 120A CSU module or a 401A T1 sync splitter, and the DS1 is
administered for ami-zcs line coding, disable density protection on the CSU during the test, due
to the large number of zero’s in the 3-in-24 test pattern.
The Far CSU Loopback test has the TN767E DS1 Interface circuit pack transmit a loop-back
activation code to the remote CSU, waits up to 15 seconds for return of the code to verify the
loop back has been established, transmits a framed 3-in-24 test pattern, begins counting bit
errors in the received test pattern, and returns a PASS result. If the loop back is not established
within the 15 seconds, the test fails.
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. Verify that the board’s translations are correct. Use add ds1
location to administer the DS1 interface if it is not already
administered.
2. If board was already administered correctly, check the error log to
determine whether the board is hyperactive. If so, the board was shut
down. Reseating the board will re-initialize it.
3. If the board was found to be correctly inserted in step 1, enter busyout
board
4. Enter reset board
5. Enter release board
6. Enter test board long
This should re-establish the link between the internal ID and the port.
Table 356: Test #1212 CPE Loopback Jack Test (continued)
Error
Code
Test
Result
Description / Recommendation
4 of 4