Avaya S8700 - Loss of Signal Alarm Inquiry Test (#138)

UDS1-BD (UDS1 Interface Circuit Pack)
Issue 1 May 2002
8-1243555-233-142
Loss of Signal Alarm Inquiry Test (#138)
This test verifies the synchronization status, echo cancellation, and continuity of
the DS1 link. The Loss of Signal alarm indicates that the UDS1 Interface circuit
pack is unable to derive the synchronization clock from the DS1 facility. When the
UDS1 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, maintenance software places every
trunk or port of the UDS1 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 UDS1 Interface circuit pack raises a Loss of Signal alarm after the signal has
been lost for about 1 second. It will not retire the alarm until the signal has
returned for about 10 seconds.
120A1 CSU Module
This test is also used to maintain the 120A1 CSU module. The CSU module,
when combined with the functionality provided by the UDS1 circuit pack, provides
functionality equivalent to an external stand-alone ESF T1 CSU. The combination
of the UDS1 and 120A1 CSU module is known as an Enhanced Integrated CSU
(I-CSU).
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. Verify that the board’s translations are correct. Execute the add ds1
UUCSS command to administer the UDS1 interface if it is not already
administered.
2. If the board was already administered correctly, check the error log to
determine whether the board is hyperactive. If this is the case, the board is
shut down. Reseating the board will re-initialize it.
3. If the board was found to be correctly inserted in step 1, then 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.
Table 8-525. Test #135 Internal Loop-Around Test — Continued
Error
Code
Tes t
Result Description / Recommendation
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