Avaya Definity SI Maintenance Manual page 1416

Maintenance Object Repair Procedures
Table 10-234. TEST #135 Internal Looparound Test — Continued
Error
Code Result
0 NO
BOARD
Loss of Signal Alarm Inquiry Test (#138)
This test verifies the synchronization status and continuity of the DS1 link. The
Loss of Signal alarm indicates that the DS1 Interface circuit pack is unable to
derive the synchronization clock from the DS1 facility. When the DS1 Interface
circuit pack detects a Loss of Signal alarm, it stops providing the synchronization
clock for the system if it is administered as a timing source and transmits a Yellow
alarm to the remote DS1 endpoint.
When the Loss of Signal alarm is confirmed, the maintenance software places all
trunks or ports of the DS1 Interface circuit pack into the out-of-service state. The
inquiry test will run every 10 minutes until the loss of signal has been restored.
The DS1 Interface circuit pack raises a Loss of Signal alarm after the signal has
been lost for about 1second. It will not retire the alarm until the signal has returned
for about 10 seconds.
This test is also used to maintain the new 120A CSU Module and the 401A T1
Sync Splitter. The CSU Module, when combined with the functionality provided by
the TN767E circuit pack, provides functionality equivalent to an external
standalone ESF T1 CSU. The 401A T1 Sync Splitter, when combined with the
functionality provided by the TN767E circuit pack, allows an ATM switch to derive
its timing from a T1 connected to the DS1 in the DEFINITY.
10-630 Issue 4 May 2002
Test
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 linkage between the internal ID and
the port.
Description/Recommendation
Continued on next page
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