Filter
Top Products
DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1555UDS1-BD (UDS1 Interface Circuit Pack)
10
This test is also used to maintain the new AT&T 120A1 CSU Module. This CSU
Module, when combined with the functionality provided by the TN464F circuit
pack, provides functionality equivalent to an external stand-alone AT&T ESF T1
CSU. The combination of the TN464F and 120A1 CSU Module is known as an
Enhanced Integrated CSU (I-CSU).
If a TN464F circuit pack detects certain I-CSU 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 TN464F board
to confirm the I-CSU error. A Minor or Warning alarm will be raised depending on
the severity of the I-CSU error. The trunks on the board may be taken out of
service if the I-CSU error is deemed serious.
If a Loss Of Signal alarm and an I-CSU 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 I-CSU 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 I-CSU errors
or Loss Of Signal alarm exist).
Table 10-460. TEST #138 Loss of Signal Alarm Inquiry Test
Error
Code
Test
Result Description/ Recommendation
ABORT Internal System Error
1. Retry the command at 1-minute intervals a maximum
of 5 times.
2. If the test continues to abort, escalate the problem.
Continued on next page