Maintenance-Object Repair Procedures
555-233-143
8-1602 Issue 1 May 2002
Control Channel Test (#296)
This tests the integrity of the Control Channel bus by ensuring that communication
through the TDM bus is operational. The test attempts to query a circuit pack
whose presence is required in each port network for proper operation (Tone-Clock
or Tone Detector). If a reply from the queried circuit pack is received, the TDM
bus is considered operational and the test passes. If no reply is received, the Bus
is not operational and the test fails.
Table 8-621. Test #296 Control Channel Test
Error
Code
Test
Result Description / Recommendation
Any
other
than
1005
ABORT Internal system error.
1. Retry the command at 1-minute intervals up to 3 times.
1005 ABORT Since this test is valid only on the control channel bus, it aborts execution when
run on the non-control channel bus. This is a valid response. Use the status
port-network command to verify which bus is the control channel bus.
None FAIL Communication through the Control Channel is not working. The problem is
not necessarily the TDM bus itself.
1. Display the hardware error and alarm log for the Tone-Clock circuit and for
the Tone Detector circuit in the port network where the faulted TDM bus
resides. See ‘‘TONE-BD (Tone-Clock Circuit)’’, ‘‘TONE-PT (Tone
Generator)’’, ‘‘GPTD-PT (General-Purpose Tone Detector Port)’’, and
‘‘DTMR-PT (Dual-Tone Multifrequency Receiver Port)’’.
2. Resolve the errors and alarms for the Tone-Clock and Tone Detector
circuits.
3. If the faulted TDM bus is on an EPN, display the hardware error and alarm
log and look for errors and alarms for the active Expansion Interface circuit
pack. See ‘‘EXP-INTF (Expansion Interface Circuit Pack)’’ on page 8-762
and resolve its errors.
4. Execute the test tdm P command again.
5. If the test still fails, see ‘‘TDM-Bus Fault Detection and Isolation’’.
PASS Communication through the control channel bus is operational.
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