Nortel Networks Circuit Card 311 User Manual
Page 967
967
NTBK50 2.0 Mb PRI card
Contents
This section contains information on the following topics:
"Physical description" (page 968)
"Functional description" (page 973)
Introduction
The NTBK50 2.0 Mb PRI card provides a 2.0 Mb PRI interface. It supports
the NTAK20 clock controller daughterboard and either the NTAK93
D-channel interface or the NTBK51 Downloadable D-channel handler.
The NTAK93 DCHI daughterboard provides identical performance to the
on-board NTAK79 DCHI. The NTBK51 DDCH daughterboard provides
support for protocols based on the MSDL platform.
You can install this card in slots 1 through 4 in the Media Gateway. The card
is not supported in the Media Gateway Expansion.
ATTENTION
IMPORTANT!
Each Media Gateway that has a digital trunk must clock the clock controller 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.
The NTBK50 card provides a 2Mb PRI interface and is installed in the
main and IP expansion cabinets. The NTBK50 supports the NTAK20
clock controller daughterboard and either the NTAK93 D-Channel interface
or the NTBK51 Downloadable D-Channel handler. The NTAK93 DCHI
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.