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Idle Time Slot Test (#294)
Idle Time Slot Test (#294)
The Idle Time Slot test detects noisy time slots on the bus and takes them out-of-service. The
Tone Detector circuit is told to listen to idle time slots. If it detects any noise on a time slot, it
returns a failure. At the end of the test, any out-of-service time slots are retested to see if they
are still noisy and are restored to service if they are idle. After every time slot has been tested,
the number of bad time slots are reported in the Error Code field. No more than 220 time slots
will be taken out-of-service on one bus, and no more than 300 will be taken out-of-service on
both buses at one time.
This test runs on TDM-BUS (TDM Bus).
Table 479: Idle Time Slot Test (#294)
Error
Code
Test
Result
Description / Recommendation
None ABORT Could not allocate the necessary system resources to run this test. For
example, maintenance could be running on the Tone Detector circuit and
it is using the CPTRs.
1. Retry the command at 1-minute intervals up to 3 times.
1115 ABORT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals up to 3 times.
Any FAIL The Error Code indicates the number of bad time slots that were
detected. The cause of this failure is most likely due to a bad port circuit
pack and not the TDM bus itself.
1. Run the command again.
2. If the error persists, check the Error and Alarm Logs for alarms on the
port network where the faulted TDM bus resides. Also check for
EXP-INTF (Expansion Interface Circuit Pack) alarms associated with
Error Type 1537.
3. Refer to the appropriate circuit pack’s documentation to clear the
circuit pack’s problem.
4. Test the TDM bus again. If the error continues, see TDM-Bus Fault
Detection and Isolation.
PASS Every idle time slot that should be idle is indeed idle. There is no noise on
any of the idle time slots.
Communication Manager Release 5.0 Issue 4 January 2008 1697