DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-222ATM-SYNC (ATM Synchronization)
3
Figure 3-10. Stratum 4 synchronization with simplex ATM PNC
NOTE:
The TN722 DS1 Interface circuit pack d oes not provide a synchronization
reference as reliably as the TN767 or TN464C circuit p acks. Therefore,
administer the TN767 or TN464C circuit pac ks as the primary or second ary
sources.
Stratum 3 Synchronization
Stratum 3 synchronization is not supported in DEFINITY with ATM PNC.
Synchronization troubleshooting
A significant part of the Synchronization Recovery Strategy for a DEFINITY with
ATM PNC resides in the ATM switch’s clock hardware, firmware, and software.
DEFINITY monitors synchronization performance and alarms faulty c omponents
within DEFINITY.
Clock
ExternalT1/E1
ExternalT1/E1
secondary
primary
ATM switc h fabr ic
ATMtiming distribution
Interface
module Interface
module Interface
module
ATM PNC
DEFINITY
PPN
DEFINITY
EPN
OC3 OC3
ATM-EI ATM -EI
Toneclock Toneclock
DS1 DS1DS1 DS1
T1-splitter
T1-primary T1-secondary
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