Nortel Networks Circuit Card 311 - Manual (Page 946)

946 NTAK79 2.0 Mb PRI card
Clock controller interface
The clock controller circuitry on the NTAK79 is identical to that of the
NTAK20 clock controller.
Though several DTI/PRI packs can exist in one system, only one clock
controller may be activated. All other DTI/PRI clock controllers must be
switched off.
clock controller circuitry on the NTAK79 is identical to that of the NTAK20
clock controller.
Note that while several DTI/PRI packs may exist in one system, only one
clock controller may be activated (all other DTI/PRI clock controllers must
be switched off).
The clock controller circuitry on the NTAK79 is identical to that of the
NTAK20 clock controller.
Though several DTI/PRI packs can exist in one system, only one clock
controller may be activated. All other DTI/PRI clock controllers must be
switched off.
Clocking modes
The clock controller can operate in one of two modes:
• tracking
• non-tracking (also known as free-run)
The clock controller can operate in one of two modes: tracking or
non-tracking (also known as free-run).
The clock controller can operate in one of two modes:
• tracking
• non-tracking (also known as free-run)
For more information on clocking modes, see 180 .
Tracking mode There are two stages to clock controller tracking:
• tracking a reference, and
• locked onto a reference.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
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