Avaya S8700 Maintenance Manual page 2241

SYNC (Port-Network Synchronization)
From
E
Figure 5
CSS problem is in switch, IPSI or Tone-Clock, EI, SNI,
or DS1 in PNs other than the timing master PN.
Slips on many EIs,
IPSIs or Tone-Clocks,
or SNIs associated
with an SN Carrier?
No
14
Replace the SNI, EI,
IPSI, or Tone-Clock
for PN with slips.
Good reference, but
SN not in sync.
Figure 8-92. Synchronization Troubleshooting, Fig 6 of 6
Notes for Sheet 1 through Sheet 6 flowcharts. (When checking for slip errors, use
the previous
1. Use the status synchronization command to determine whether
synchronization is enabled and to determine the on-line reference. If the
on-line reference is a Tone-Clock board, the switch is operating in free run
mode. If Stratum 3 is displayed, and no DS1s are connected to the
Stratum-3 clock or no DS1 connection existed to the Stratum-3 clock for
over 24 hours, then the Stratum-3 clock is in free run mode.
2. Check for slip errors against DS1-BD and UDS1-BD.
555-233-143
Replace the EI, SNI, and
Yes
IPSI or Tone-Clock associated
with the reference PN one
at a time. If slips remain,
replace the SNC.
Slips remain?
Done
Table 8-590 on page 8-1513
13
Yes
Yes
Are slips
isolated to
a PN?
No
and .):
Issue 1 May 2002
No
Escalate
8-1519