Nortel Networks Circuit Card 311 User Manual
Page 923
923
NTAK79 2.0 Mb PRI card
Contents
This section contains information on the following topics:
"Physical description" (page 924)
"Functional description" (page 932)
Introduction
The NTAK79 2.0 Mb Primary Rate Interface (PRI) card provides a 2.0 Mb
interface and an onboard D-channel handler (DCH). The NTAK79 card
also includes an onboard clock controller (equivalent to the NTAK20 Clock
Controller) that can be manually switched into or out of service.
The NTAK79 card does not support the NTBK51 downloadable D-channel
handler daughterboard.
You can install this card in slots 1 through 4 in the Media Gateway. The card
is not supported in the Media Gateway Expansion.
Note: Up to three four trunk cards are supported in each Media
Gateway.
ATTENTION
IMPORTANT!
Each Media Gateway that has a digital trunk must have a clock controller clocked
to an external reference clock.
Note: Clocking slips can occur between systems that are clocked from
different Central Offices (COs), if the COs are not synchronized. The
slips can degrade voice quality.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.