User manual
DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-1076TDM-BUS (TDM Bus)
3
ANY FAIL This error represents the number of PPM errors detected on the external
synchronization source since the last PPM inquiry was sent to the
Tone-Clock circuit pack. A failure of this test indicates that we are outside
of Stratum 4 timing specifications on the external timing source. This error
produces an invalid timing signal for any system that uses this source for a
synchronization reference. The error code is a variable amount ranging
from 1 to 254.
1. If there are errors against SYNC (Synchronization), refer to SYNC
(Synchronization) Maintenance documentation to change the system
synchronization reference, OR
2. If there are errors against STRAT-3 (Stratum 3 Clock), refer to the
STRAT-3 (Stratum 3 Clock) Maintenance documentation to resolve the
errors, OR
3. If there are errors against DS1-BD (DS1 Interface circuit pack), refer to
the DS1-BD (DS1 Interface Circuit Pack) Maintenance documentation
to resolve the errors, OR
4. If there are no other errors besides Error Type 1537 against TDM-CLK
and if this error was logged against the Tone-Clock circuit pack that
provided the current system synchronization reference (use the status
synchronization command to determine this), replace the defective
Tone-Clock circuit pack.
!
WARNING:
Since service may be disrupted when the following procedures are
carried out, try to perform the following steps when it is convenient
for the customer.
5. If the Tone-Clock circuit pack under test is in the Active mode but is not
providing the current system synchronization reference, switch the
synchronization reference to the Tone-Clock circuit pack under test
using the set synchronization PC command. Rerun the test. If the test
still fails, replace the defective Tone-Clock circuit pack.
6. If the Tone-Clock circuit pack under test is in the Standby mode place it
in the Active mode via the command set tone-clock PC. Switch the
synchronization reference to the Tone-Clock circuit pack under test
using the set synchronization PC command. Rerun the test. If the test
still fails, replace the defective Tone-Clock circuit pack.
Table 3-477. TEST #150 TDM Bus Clock PPM Inquiry Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page