Ntak20 Clock Controller Daughterboard; Contents; Introduction - Nortel Circuit Card 311 Reference

NTAK20 Clock Controller
daughterboard

Contents

This section contains information on the following topics:
"Introduction" (page 903)
"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:
•
•
•
•
•
•
The NTAK20 clock controller card supports 1.5 Mb, 2.0 Mb, and 2.56 Mb
clock recovery rates.
Copyright © 2003-2008, Nortel Networks
.
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.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
903