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TDM-CLK (TDM Bus Clock)
Issue 5 October 2002
1667
555-233-119
TDM-CLK (TDM Bus Clock)
NOTE:
Replacing the tone/clock circuit pack requires a special procedure described
in the documentation for TONE-BD. That section also describes the LED
displays for this board.
The Time Division Multiplex (TDM) Bus Clock resides on the Tone-Clock circuit
pack, providing clocking signals both for the TDM Bus and the LAN Bus. The
Tone-Clock circuit pack is a critical component in the system and is necessary to
ensure the operation of all port circuit packs in the system. The TDM buses of the
PPN are synchronized together. The system timing reference can be derived
internally from the Tone-Clock circuit pack, or from an external (off-board) timing
reference. Currently, the TDM Bus Clock supports synchronizing the TDM Bus
with interface rates from Digital Signal 1 (DS1) facilities as primary or primary and
secondary references.
Moreover, the Tone-Clock circuit pack aids in monitoring and selecting
synchronization references. The Tone-Clock circuit pack, after detecting that the
external source of timing is not valid, will automatically begin its escalation
procedure, according to the facilities administered.
NOTE:
Switching back to a DS1 source is handled by synchronization maintenance,
once any problems with it have been corrected and tested. However, once
synchronization has been switched to the internal timing source of the
master Tone-Clock circuit pack, switching back to a Stratum 3 Clock must be
initiated by a technician after the external reference has been repaired.
MO Name (in
Alarm Log)
Alarm
Level
Initial Command To Run
1
1.
P is the cabinet number (1). C is the carrier designation (A, B, or C).
Full Name of MO
TDM-CLK
MAJOR
test tone-clock PC short
TDM Bus Clock
TDM-CLK
MINOR
test tone-clock PC short
TDM Bus Clock
TDM-CLK
WARNING
release tone-clock PC
TDM Bus Clock
Содержание DEFINITY Server CSI
Страница 1: ...Maintenance for Avaya DEFINITY Server CSI Volumes 1 and 2 Release 1 2 555 233 119 Issue 5 October 2002...
Страница 6: ......
Страница 20: ...Contents 555 233 119 20 Issue 5 October 2002...
Страница 30: ...About this Book 555 233 119 30 Issue 5 October 2002...
Страница 944: ...Maintenance Objects 555 233 119 944 Issue 5 October 2002...
Страница 1397: ...MMI BD Issue 5 October 2002 1397 555 233 119 Figure 44 TN787 Multimedia Interface MMI Circuit Pack...
Страница 1409: ...MMI PT Issue 5 October 2002 1409 555 233 119 Figure 45 TN787 Multimedia Interface MMI Circuit Pack...
Страница 1891: ...VC DSPPT Issue 5 October 2002 1891 555 233 119 Figure 63 VC Circuit Pack DSP Port Local TDM Loopback Test...
Страница 1902: ...Maintenance Objects 1902 Issue 5 October 2002 Figure 65 VC Circuit Pack Summer Port Loopback Test...