Nortel Networks Circuit Card 311 User Manual
Page 903
903
NTAK20 Clock Controller
daughterboard
Contents
This section contains information on the following topics:
"Physical description" (page 909)
"Functional description" (page 910)
Introduction
Digital trunking requires synchronized clocking so that a shift in one
clock source results in an equivalent shift in all parts of the network.
Synchronization is accomplished with an NTAK20 clock controller
daughterboard in each Media Gateway that contains a digital trunk card.
The NTAK20 clock controller daughterboard mounts directly on the following
cards:
•
NTAK09 1.5Mb DTI/PRI
•
NTBK50 2.0 Mb PRI
•
NTRB21 DTI/PRI/DCH TMDI
•
NTBK22 MISP
•
NT6D70 SILC
•
NT6D71 UILC
Note: The card is restricted to slots 1 through 3 in EMC- type cabinets
(such as NAK11Dx and NTAK11Fx cabinets). It does not work in slots 4
through 10 in these cabinets.
The NTAK20 clock controller card supports 1.5 Mb, 2.0 Mb, and 2.56 Mb
clock recovery rates.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.