Maintenance-Object Repair Procedures
555-233-143
8-266 Issue 1 May 2002
Figure 8-10. Stratum-4 Synchronization with Unduplicated ATM PNC
NOTE:
The TN722 DS1 Interface circuit pack does not provide a synchronization
reference as reliably as the TN767 or TN464C circuit packs. Therefore,
administer the TN767 or TN464C circuit packs as the primary or secondary
sources.
Stratum-3 Synchronization
Stratum-3 synchronization is not supported in S8700 Multi-Connect with ATM
PNC.
Synchronization Troubleshooting
A significant part of the Synchronization Recovery Strategy for a S8700
Multi-Connect with ATM PNC resides in the ATM switch’s clock hardware,
firmware, and software. S8700 Multi-Connect monitors synchronization
performance and alarms any faulty components. See ‘‘SYNC (Port-Network
Synchronization)’’ on page 8-1509.
Clock
External T1/E1
External T1/E1
secondary
primary
ATM switch fabric
ATM timing distribution
Interface
module
Interface
module
Interface
module
ATM PNC
DEFINITY
PPN
DEFINITY
EPN
OC3 OC3
ATM-EI ATM-EI
Tone clock Tone clock
DS1 DS1DS1 DS1
T1-splitter
T1-primary
T1-secondary
iodfst4 LJK 011998
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