TDM-CLK (TDM Bus Clock)
Issue 4 May 2002
10-1723 555-233-123
Notes:
a. The Tone-Clock circuit pack may have a clock at the edge of its specified
frequency. This can cause Expansion Interface circuit packs and SNI circuit
packs to go out-of-frame or report no-neighbor conditions. This can is turn
cause EPNs, Expansion Archangel Links (EALs), Remote Neighbor Links
(RNLs), and/or Local Neighbor Links LNLs) to go down. When this error is
alarmed, Clock Health Inquiry Test (#46) will fail with an error code of 1.
1. Replace the Tone-Clock circuit pack identified in the error log. See
How to Replace the Tone-Clock Circuit Pack in the TONE-BD
section.
b. The indicated Tone-Clock circuit pack has been made unavailable via the
busyout tone-clock UUC command. It only applies to systems which have
the High or Critical Reliability Option administered, because only a standby
Tone-Clock circuit pack may be made busy by that command. To resolve
this error, execute the release tone-clock UUC command for the alarmed
circuit pack.
c. This error type indicates that the circuit pack has been removed or has
been insane for more than 11 minutes. To clear the error, reinsert or
replace the circuit pack.
d. The Tone-Clock circuit pack in the PPN is not a TN780 while a Stratum 3
synchronization is administered. Replace the Tone-Clock in the PPN with a
TN780, or change synchronization administration to Stratum 4 if a Stratum
3 clock is not being used.
1537 Any Clock PPM
Inquiry(#150)
test tone-clock UUC sh
2049(i) Any Standby Reference
Health Check
Test(#651)
MAJOR
3
ON test tone-clock UUC
2305(j) 0 None WARNING OFF
1 As a general rule, any on board errors against the TDM Bus Clock should be resolved before
pursuing any other errors against SPE or PNC components. Off board clock errors may be caused
by other board errors, and should usually be addressed once any on board errors have been
resolved.
2 Run the Short Test Sequence first. If all tests pass, run the Long Test Sequence. Refer to the
appropriate test description and follow the recommended procedures.
3 Major or Minor alarms on this MO may have been downgraded to Warning alarms based on the
values used in the set options command.
Table 10-635. TDM Bus Clock Error Log Entries — Continued
Error
Type
Aux
Data Associated Test
Alarm
Level
On/Off
Board
1
Test to Clear Value
Continued on next page
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