Nortel Communication Server 1000 Manual page 103

synchronization, the other defined as the secondary reference source. The
secondary reference acts as a backup to the primary reference.
As shown in
(page
and CC-1). One clock controller acts as a backup to the other. The clock
controllers should be completely locked to the reference clock.
Figure 26
Clock Controller primary and secondary tracking
Free run (non-tracking) mode The clock synchronization of the system
can operate in free-run mode if:
•
no loop is defined as the primary or secondary clock reference,
•
the primary and secondary references are disabled, or
•
the primary and secondary references are in local (near end) alarm
Figure 26 "Clock Controller primary and secondary tracking"
103), a system with dual CPUs can have two clock controllers (CC-0
Nortel Communication Server 1000
DASS2 Fundamentals
NN43001-571 04.01 4 June 2010
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NT5D97AD Dual-port DTI2/PRI2 card 103