DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1575SYNC (Synchronization)
9
Figure 9-99. Synchronization Troubleshooting, Page 6 of 6
Notes for Sheet 1 through Sheet 6 flowcharts (when checkin g for slip errors, use
the table above,
Error Log Entries for Slip Errors
):
1. Use the status synchronization command to determine whether
synchronization is enabled and to determine the on-line referenc e. If the
on-line reference is a tone-clock b oard, the switch is op erating in free run
mode. If the Stratum 3 is displayed , and no DS1s are connected to the
Stratum 3 clock or no DS1 connection exist ed to the Stratum 3 clock for
over 24 hours, then the Stratum 3 clock is in free run mod e.
2. Check for slip errors agai nst DS1-BD and UDS1-BD.
3. If Stratum 3 is administered (display synchronization) and on-line
(status synchronization), check for DS1-BD or UDS1-BD slip errors for
the DS1(s) or UDS1(s) used as input to the Stratum 3 clock. C heck the
LED indications on the Stratum 3 clock to d etermine which DS1 is
providing input t o the Stratum 3 and examine the cross connec t
information for that DS1.
4. Check for slips errors against EXP-INTF, SNI-BD, and TDM-CLK.
Yes
13
GOOD REFERENCE
BUT SN NOT
IN SYNC
REPLACE ONE AT A
TIME: EI, SNI, AND
TONE-CLOCK
ASSOCIATED WITH
REFERENCE PN.
IF SLIPS REMAIN,
REPLACE SNC.
SLIPS ON MANY
EIs, TONE-CLOCKs,
OR SNIs ASSOCIATED
WITH AN SN
CARRIER
REPLACE SNI, EI,
TONE-CLOCK FOR
PN WITH SLIPS
CSS SYSTEM NOT
TOTALLY IN SYNC
E
ESCALATE
DONE
Yes
Yes
14
No
No
SLIPS
ISOLATED
TO A PN?
SLIPS
REMAIN?
No