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SYNC (Port-Network Synchronization)
Issue 1 June 2005 2155
Figure 130: Synchronization Troubleshooting, Fig. 1 of 4
Slips
No
Yes
Is synchronization
enabled?
A
Is reference a
free-running IPSI
Synchronization is enabled
for this port network.
Fig 2
Slips on
DS1 facilities?
Problem is
in switch.
Fig 3
Fig 4
Problems with
reference PN or
synchronization plan
Slips on IPSI’s Tone CLK circuit
or non-reference PN DS1s
C
B
1
1
2
No
Yes
Yes
No
Tone-Clock circuit?
Enable
synchronization.