Nortel Networks 1000 User Manual
Page 867
867
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NTBK50 2.0 Mb PRI card
Contents
This section contains information on the following topics:
“Physical description” (page 868)
“Functional description” (page 873)
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
02.06
Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
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