Nortel Networks NN43001-301 - Manual (Page 261)

Install the NTAK79 PRI card 261
The DCHI is responsible for performing the Q.921 layer 2 protocol
information. It transfers layer 3 signaling information between two adjacent
network switches.
The NTAK93 DCH daughterboard, when installed on the NTBK50 circuit
card, is addressed in the same slot as the NTBK50.
A minimum of one NTAK93 is required for each PRI link. If more than one
PRI link connects to the same end location, a single DCHI circuit card can
support up to a maximum of sixteen PRI connections for the system. This
allows for the support of 495 B-Channels or PRI trunks.
NTBK51 Downloadable D-Channel (DDCH) daughterboard
The NTBK51 DDCH daughterboard interfaces with the system Central
Processing Unit (CPU) and mounts on the NTBK50 2.0 Mb PRI circuit card
for PRI D-Channel applications.
Digital trunk cards are not supported in Media Gateway Expansions.
The DDCH is equivalent to the MSDL card on larger systems, but it only
supports D-channel applications (no SDI or ESDI).
The NTBK51 DDCH daughterboard, when installed on the NTBK50 circuit
card, is addressed in the same slot as the NTBK50.
A minimum of one NTBK51 is required for each PRI link. If more than one
PRI link connects to the same end location, a single DDCH circuit card
can support up to a maximum of 16 PRI connections for the system. This
enables support for 495 B-channels or PRI trunks.
Install the NTAK79 PRI card
The steps required to install PRI are as follows:
Step Action
1 Inspect the PRI card.
2 Set the switches on the PRI card.
3 Insert the PRI card in slots 1-9 of the Small System main cabinet,
or in slots 11-19, 21-29, 31-39, 41-49 of the first, second, third, and
fourth Expansion cabinets, respectively.
4 Connect the cables.
—End—
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
.