Avaya S8700 Maintenance Manual page 2327

TDM-CLK (TDM Bus Clock)
Tone-Clock Synchronization
Role Facilities
MASTER Stratum-3 clock
DS1 Primary and
Secondary
DS1 Primary Only
No External Source
SLAVE PNC Duplication
No PNC Duplication
See ''SYNC (Port-Network Synchronization)'' on page 8-1509
about the escalation plan. There is a strong interdependency among the DS1
Interface circuit pack's Maintenance, Synchronization Maintenance, and TDM Bus
Clock Maintenance MOs.
See ''TONE-BD (Tone-Clock Circuit)'' on page 8-1659
relationship of Tone-Clock circuits with the various reliability options.
555-233-143
Initial External Backup External
Synchronization Synchronization
Source Source
Source "A" Source "B"
DS1 Primary DS1 Secondary
DS1 Primary None
None None
Active EI Standby EI
Active EI None
Internal
Source
Local
oscillator
for more details
for a discussion of the
Issue 1 May 2002 8-1605