Maintenance-Object Repair Procedures
555-233-143
8-1514 Issue 1 May 2002
Troubleshooting Synchronization Problems
The following flow chart presents a logical approach to troubleshooting
synchronization problems in conjunction with the previous background
information. Explanatory notes follow the charts.
Figure 8-87. Synchronization Troubleshooting, Fig. 1 of 6
Slips
No
Enable
synchronization.
Yes
Is synchronization
enabled?
A
Is reference a
free-running Tone-Clock?
System is
operating
as a timing
slaveinnetwork.
Synchronization is enabled
in system operating as port
network’s timing master.
To Fig 2
Slips on
DS1 facilities?
SlipsonsomeDS1
facilities in same PN
as reference?
Yes
No
Problem is
in switch.
To Fig 5
To Fig 4
Problems with
reference PN or
synchronization plan
Slips on IPSI or Tone CLK, EIs
SNIs, or non-reference PN DS1s
C
D
1
1
2
3
No
Yes
Yes
No
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