User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1333SYNC (Synchronization)
10
2.Test the active Tone-Clock circuit pack in the master port network via the
test tone/clock PC long command. Check the Error Log for
TDM-CLK errors and verify that TDM Bus Clock Test #148 passes
successfully. If Test #148 fails with an Error Code 2 through 32,
refer to the TDM-CLK (TDM Bus Clock) Maintenance
documentation to resolve the problem. If not, continue with the
following steps.
3.High or Critical Reliability system: Switch Tone-Clock circuit packs on
the master port network via the set tone/clock PC command.
Standard system: Replace the primary and secondary (if
administered) DS1 Interface circuit packs.
4.Check for an error logged against the primary or secondary DS1 board.
If there is an error, follow the DS1 section to resolve the errors. If
there is not, enter enable sync, and wait for two to five minutes for
the primary sync source to come on-line.
In Release 5si + memory: This error indicates that some reference
switches have occurred. If there is not a major SYNC alarm, then
investigate other SYNC errors. If there is an active major SYNC
alarm, and if this is not a Stratum 3 system, then follow the steps
above.
f. This error indicates that the Expansion Interface Link is experiencing
timing slips. The two port networks are not synchronized. This error
increases the bit error rates for data transmission between port networks.
Verify that all the TDM/LAN Bus cables on the backplane are AT&T Parts
number AT&T SK00199-001 rather than flat ribbon cables. Also, check
that the bus terminators are the ZAHF V1 TDM/LAN Bus Terminator type.
Refer to note (i) for error resolution steps.
This error is cleared by a leaky bucket strategy and takes one hour to
clear (leak away) the error counter once it is alarmed. Therefore, it may
take up to one hour to clear the alarm after the problem is cleared.
g. This error indicates that the slave Tone-Clock circuit pack is experiencing
loss of signal. Refer to note (i) for error resolution steps.
h. The following steps should be executed to resolve error 2049 and 2305:
1.Check for timing loops, and resolve any loops that exist.
2.Check the Error Log for any active as well as resolved Expansion
Interface circuit pack errors and refer to EXP-INTF (Expansion
Interface Circuit Pack) Maintenance documentation to resolve any
errors found.
3.High or Critical Reliability system:
■ Switch Tone-Clock circuit packs in the slave port network via
the set tone/clock PC system technician command. The
error count for this particular error should start decrementing
once the problem is solved—if the count does not decrease
in 15 minutes the problem still persists.