Reference Clock Errors; Automatic Clock Recovery - Avaya Nortel Communication Server 1000 Reference

NT5D97 Dual-port DTI2 PRI2 card
Figure 83: Clock Controller primary and secondary tracking

Reference clock errors

CS 1000 software checks at intervals of 1 to 15 minutes to see if a clock controller or reference-
clock error has occurred. (The interval of this check can be configured in LD 73).
In tracking mode, at any one time, there is one active clock controller which is tracking on one
reference clock. If a clock controller error is detected, the system switches to the backup clock
controller, without affecting which reference clock is being tracked.
A reference-clock error occurs when there is a problem with the clock driver or with the
reference clock at the far end. If the clock controller detects a reference-clock error, the
reference clocks are switched.

Automatic clock recovery

A command for automatic clock recovery can be selected in LD 60 with the command EREF.
282 Circuit Card Reference
Comments? infodev@avaya.com
July 2011