Filter
Top Products
DS1-BD (DS1 Interface Circuit Pack)
Issue 1 June 2005 997
S8700 MC
This test is also used to maintain the 120A CSU module and the 401A T1 sync splitter. The
CSU module, when combined with the functionality provided by the TN767E circuit pack,
provides functionality equivalent to an external standalone ESF T1 CSU The 401A T1 sync
splitter, when combined with the functionality provided by the TN767E circuit pack, allows an
ATM switch to derive its timing off a T1 facility connected to the S8700 Multi-Connect’s
DS1circuit pack.
If a TN767E circuit pack detects certain I-CSU/T1 sync splitter hardware errors, it will notify the
maintenance subsystem. When the subsystem receives notification of the error, it executes 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 error. A Minor or Warning alarm will be raised
depending on the severity of the error. The trunks on the board may be taken out of service if
the error is deemed serious.
If a Loss of Signal alarm and an I-CSU/T1 sync splitter error co-exist, the Loss of Signal alarm
condition takes priority, and the board and all of its trunks are put in the out-of-service state.
However both errors will be logged.
When the maintenance subsystem receives notification that the ICSU/T1 sync splitter 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 errors or Loss of Signal alarm exist).
Table 344: Test #138 Loss of Signal Alarm Inquiry Test
Error
Code
Test
Result
Description / Recommendation
ABRT Internal system error
2100 ABRT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals up to 5 times.
1 of 7