Nortel Networks NN43001-301 - Manual (Page 258)

258 2.0 Mb PRI implementation
Circuit card Description
NTAK79 2.0 Mb PRI circuit card.
Supports an onboard clock controller and an
onboard D-channel handler interface.
NTAK20 Clock-controller daughterboard. The system
supports only one active clock controller per
system or IP expansion cabinet.
Note: Every cabinet or Media Gateway that
contains a digital trunk must contain a clock
controller.
Connects to the NTBK50 PRI card.
NTAK93 D-channel-handler interface (DCHI)
daughterboard.
Connects to the NTBK50 PRI card.
NTBK51 Downloadable D-channel daughterboard
(DDCH).
Connects to the NTBK50 PRI card.
Cables
One of the following cables is required for a PRI connection:
• CEPT Cable - NTBK05DA (120 1 /
2
twisted pair—6.15 m length), or
• CEPT Cable - NTBK05CA (75 1 /
2
Ensure the document title is correct. m
length)
Hardware description
2.0 Mb PRI cards
Two PRI cards are available on the system:
• NTAK79 2.0 Mb PRI card
• NTBK50 2.0 Mb PRI card
The difference between the two PRI cards is that the NTBK50, when
equipped with the NTBK51 D-channel daughterboard, can download
software onto the card. This feature is based on the MSDL platform and
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
Copyright © 2003-2007, Nortel Networks
.