UDS1-BD (UDS1 Interface Circuit Pack)
Issue 4 May 2002
10-1863
555-233-123
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 all
trunks or ports 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.
PASS
All administered trunks or ports of the UDS1 Interface circuit pack
pass the Internal Looparound Test. The bit pattern consistency
test is executed successfully over the path that covers a DS1 port,
cable, and the external NCTE device.
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. Ensure that the board 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 the board.
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 10-672.
TEST #135 Internal Looparound Test — Continued
Error
Code
Test
Result
Description/Recommendation
Continued on next page
Summary of Contents for Definity SI
Page 1: ...0DLQWHQDQFH IRU YD D 1 7 6HUYHU 6 Volumes 1 2 and 3 555 233 123 Issue 4 May 2002...
Page 62: ...Maintenance Architecture 555 233 123 1 26 Issue 4 May 2002...
Page 92: ...Management Terminals 555 233 123 3 26 Issue 4 May 2002...
Page 204: ...Routine Maintenance Procedures 555 233 123 5 100 Issue 4 May 2002...
Page 250: ...LED Interpretation 555 233 123 7 10 Issue 4 May 2002...
Page 2804: ...Maintenance Object Repair Procedures 555 233 123 10 2018 Issue 4 May 2002...