DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1725TDM-CLK (TDM Bus Clock)
9
2. Refer to SYNC maintenance, in the “Approach to Troubleshooting”
section, 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. If this error is against a PPN clock board and the system is using a
Stratum 3 clock, check the cabling that brings the stratum 3 signal
to this clock board.
2. Replace the current standby Tone-Clock circuit pack. See
How to
Replace the Tone-Clock Circuit Pack
in the TONE-BD section.
j. The indicated active Tone-Clock circuit pack, which is on a port network
that does not contain the system synchronization reference (a
slave
Tone-Clock), has detected a loss of timing signal from its EXP-INTF
synchronization source.
1. Enter
display errors
and
display alarms
, and follow the
associated repair procedures for EXP-INTF, TDM-CLK, and
TONE-BD error log entries that have on-board alarms.
2. If the 2305 errors persist, follow the repair procedures for EXP-INTF
error log entries 257, 769, or 770, or any errors logged against
SNI-BD, SNC-BD, or FIBER-LK.
3. If the 2305 errors persist:
a.
For Port Networks with more than one Tone-Clock circuit
pack
, execute the command test synchronization r 10, and
check to see if new 2305 errors against TDM-CLK were
reported. If not, execute reset PNC interchange and then test
synchronization r 10 again, and recheck for new 2305 errors
against TDM-CLK
b.
For Port Networks with a single Tone-Clock circuit pack
,
execute the command test synchronization r 10, and check
to see if new 2305 errors were reported.
If no new instances of the 2305 errors were logged for either test,
then enter test tone-clock UUC long clear to clear the TDM-CLK
errors and the procedure is complete.
