TDM-CLK (TDM Bus Clock)
Issue 5 October 2002
1671
555-233-119
2. Otherwise, enter the display errors command, and follow corrective
procedures for any other TDM-CLK, TONE-BD, SYNC, DS1C-BD,
EXP-INTF, SNC-BD, and SNI-BD errors logged, except for those in
the following table.
3. If 1025 errors persist, refer to SYNC Maintenance.
h. Error Type 1281
This error is an indication that the Tone-Clock circuit
pack has detected a loss of timing signal from the system synchronization
reference. The Tone-Clock circuit pack has switched synchronization
references.
1. Resolve any errors logged against the SYNC or STRAT-13
maintenance objects.
2. Refer to SYNC maintenance if the error is not resolved by step 1
Error Type 1282
Indicates that the TN2182 tone-clock was synchronized
to a DS1 facility and that the reference frequency provided by the DS1
drifted beyond a range that could be tracked by the TN2182. Therefore the
TN2182 is no longer synchronized to that DS1 reference. If a second DS1
is available, the tone-clock may be synchronized to that reference. If no
secondary DS1 reference is available, the tone-clock will run off of its
internal clock. This may result in slips being reported by the tone-clock and
all DS1 facilities.
i. The tone-clock circuit pack in the master port network was unable to detect
the incoming synchronization signal, but the other tone-clock was able to
detect the references. If the aux data is 0, the problem is with the signal on
the primary. If the aux data is 1, the problem is with the signal on the
secondary. The system should switch clocks in this situation.
1. Replace the Tone-Clock circuit pack.
j. The indicated Tone-Clock circuit pack has detected a loss of timing signal.
1. Enter display errors and display alarms, and follow the associated
repair procedures for TDM-CLK error log entries that have on-board
alarms.
Error Log Entries for Slip Errors
Circuit Pack Name
Error Log
Name
Error Log Entry
for Slips
DS1 Interface
DS1-BD
3073 to 3160
Tone-Clock
TDM-CLK
1025
UDS1 Interface
UDS1-BD
3073 to 3160
DS1C Circuit Pack
DS1C-BD
3329