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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-577DS1-BD (DS1 Interface Circuit Pack)
10
CSU Repeater Loopback Test (#1211)
This test is destructive.
The CSU Repeater Loopback (RLB) Test causes a loopback at the far-edge of
the local 120A CSU Module and tests the connection from the TN767E DS1
board to and including the CSU Module circuitry. This test will only be performed
FAIL DS1 Interface circuit pack failed the CSU Equipment Loopback Test.
1. Retry test ds1-loop PCSS ds1/csu-loopback-tests.
2. If the ELB test continues to fail, then either the TN767E board, the CSU
Module, or the I/O cable between the backplane and the CSU module (or
any combination thereof) has failed. Attempt to isolate the problem to one of
these areas. Replace the CSU Module and running test ds1-loop PCSS
ds1/csu-loopback-tests again.
3. If the ELB test continues to fail, then replace the TN767E board and run test
ds1-loop PCSS ds1/csu-loopback-tests again.
4. If the ELB test continues to fail, the problem could be in the I/O cable
between the backplane and the CSU module.
PASS The ELB test executed successfully. The test pattern was transmitted and
received successfully over the connection from the TN767E DS1 board to the
near-edge of the 120A1 CSU Module.
0NO
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
PCSS 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 10-160. TEST #1210 CSU Equipment Loopback Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page