Nortel Communication Server 1000S Installation And Configuration Manual page 243

The NTRB21can be equipped with the NTAK09 DTI/PRI card (with the
NTBK51 downloadable D-channel daughterboard) and the NTAK93 DCHI
daughterboard.
Note 3: A TMDI D-channel programmed as a backup D-channel
against a non-TMDI primary D-channel is not supported. Backup
D-channels are supported only when programmed against TMDI
primary D-channels.
Figure 76 on page 244
Shelf slot assignments
For Small Systems, the NTRB21 can be placed in main and expansion
cabinets in any single card slot given in Table 74 on
For CS 1000S, the NTRB21 can be placed in MG 1000S systems, in the slots
given in Table 74 on
The MG 1000S Expansion does not support digital trunks (DTI/PRI).
ISDN Primary Rate Interface
1.5 Mb PRI implementation
shows a faceplate of the NTRB21 TMDI card.
page 250.
Page 243 of 394
page 250.
Installation and Configuration