Lucent Technologies Release 7 User Manual
DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-248
ATM-SYNC (ATM Synchronization)
9
Figure 9-12.
Stratum 4 synchronization with simplex 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.
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 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 components
within DEFINITY. Refer to
ATM PNC resides in the ATM switch’s clock hardware, firmware, and software.
DEFINITY monitors synchronization performance and alarms faulty components
within DEFINITY. Refer to
‘‘SYNC (Synchronization)’’
.
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
DS1
DS1
DS1
T1-splitter
T1-primary
T1-secondary
iodfst4 LJK 011998