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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-1087TDM-CLK (TDM Bus Clock)
3
TDM Bus Clock Parameter Update Test (#151)
This test updates the following internal parameters on the Tone-Clock circuit
pack:
■ Disable in-line duplication status messages.
■ Set the PPM threshold at 85 PPM for TN2182.
■ Enable PPM threshold switching
■ Set the number of slips to trigger
loss of signal
- currently 30 per 5
millisecond period
■ Enable the on-board synchronization switching algorithm (see above)
■ Enable holdover operation (TN2182 only).
255 ABORT The Tone-Clock circuit pack was using its local oscillator rather than
synchronizing to an external source.
1. Verify that this Tone-Clock circuit pack is expected to be the
synchronization source. If not, correct the synchronization information
and re-execute the test.
2000 ABORT Response to the test request was not received within the allowable time
period.
2100 ABORT System resources required to run this test are not available.
1. Retry the command at 1-minute intervals a maximum of 5 times.
Any FAIL The error code represents the rate (in Parts Per Million, or PPM) at which
clock slip errors have been detected on the incoming 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 incoming timing source.
The error code is a variable amount ranging from 1 to 254.
1. If error 1537 is entered in the hardware error log against TDM-CLK, then
the board has switched timing sources. Follow the procedures
associated with hardware log error code 1537.
2. Otherwise, refer to "Approach to Troubleshooting" in the
Synchronization (SYNC) Maintenance section of this manual.
PASS The Tone-Clock circuit pack does not detect timing any PPM errors. This
indicates that the external synchronization timing source is valid or that the
system synchronization reference is a Tone-Clock circuit pack. The status
synchronization command should be used to verify that the desired
synchronization reference is providing timing for the system.
Table 3-482. TEST #150 TDM Bus Clock PPM Inquiry Test — Continued
Error
Code
Te st
Result Description/ Recommendation
Continued on next page