Filter
Top Products
DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-493DS1-BD (DS1 Interface Circuit Pack)
10
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. This Module, when
combined with the functionality provided by the TN767E circuit pack, provides
functionality equivalent to an external standalone ESF T1 CSU.
If a TN767E circuit pack detects certain ICSU hardware errors, it will notify
maintenance. When the maintenance subsystem receives notification of the
I-CSU error, it will execute this Loss of Signal Inquiry test. The test, in addition to
querying for a Loss Of Signal alarm condition, will also query the TN767E board
to confirm the I-CSU error. A Minor or Warning alarm will be raised depending on
the severity of the ICSU error. The trunks on the board may be taken out of
service if the ICSU error is deemed serious.
If a Loss Of Signal alarm and an ICSU error co-exist, the Loss Of Signal alarm
condition will take priority and the board and all trunks on the board will be put in
the out-of-service state. Errors will be logged, however, for both.
When the maintenance subsystem receives notification that the ICSU hardware
error condition no longer exists, maintenance will restore the board and all trunks
to their previous service state if the alarm can be cleared (no other ICSU errors or
Loss Of Signal alarm exist)
Table 10-165. TEST #138 Loss of Signal Alarm Inquiry Test
Error
Code
Test
Result Description/ Recommendation
ABORT Internal system error
2100 ABORT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals a maximum of 5 times.
Continued on next page