Software Description; Hardware Description; Architecture - Nortel Circuit Card Installation Manual

Software description

Hardware description

NTRB21 TMDI card

Architecture

Signaling interface
Interconnection
Changes from the NTAK09 are required for the new trunk card and License
parameters are n service change and maintenance overlays. There is a change
to CardLAN to introduce a new CardLAN ID. The download of PSDL data
is also changed to handle a 32 bit download as well as existing 16 bit.
The NTRB21 TMDI card provides 1.5 MBits Digital Trunk Interface or
Primary Rate Interface functionality. It also has a built-in downloadable
D-channel.
The NTRB21 can be used with the NTAK09 DTI/PRI card (with the
NTBK51 downloadable D-channel daughterboard).
Figure 178 on page 832
The signaling interface performs an 8 Kbps signaling for all 24 channels and
interfaces directly to the DS-30X link. Messages transmitted in both
directions are three bytes long.
The interconnection to the carrier is by NTBK04, a 1.5 Mb 20 ft. carrier cable.
The NT8D97AX, a fifty-foot extension cable, is also available.
NTRB21 DTI/PRI/DCH TMDI card
shows a faceplate of the NTRB21 TMDI card.
Circuit Card
Page 831 of 906
Description and Installation