DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1847UDS1-BD (UDS1 Interface Circuit Pack)
9
This test is also used to maintain the new Lucent 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 Lucent 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).
