Hardware Description; Ntrb21 Tmdi Card - Nortel Meridian 1 Option 11C Manual

Page 12 of 100 PRI Implementation

Hardware description

NTRB21 TMDI card

553-3011-310 Standard 13.00
Note: Contact your Nortel Networks Sales representative for specific
local CSU requirements.
The NTRB21 TMDI card provides 1.5 MBit/s Digital Trunk Interface or
Primary Rate Interface functionality on the Option 11C. The NTRB21 has a
built-in downloadable D-channel which may occupy any single card slot
(1-9), in the Option 11C main cabinet. In IP Expansion cabinets, the card may
be placed in slots 11-19, 21-29, 31-39 or 41-49 of the first, second, third and
fourth expansion cabinets, respectively.
Note 1: For CISPR B group cabinets, the active Clock Controller
(NTAK20) can only occupy slots 1-3, 11-13, 21-23, 31-33, or 41-43 in
an Option 11C cabinet. For FCC and/or CISPR A group cabinets, this
limitation does not exist.
Note 2: The NTRB21can be equipped together with the NTAK09
DTI/PRI card (with the NTBK51 downloadable D-channel
daughterboard), and the NTAK93 DCHI daughterboard.
Figure 1 on page 13 shows a faceplate of the NTRB21 TMDI card.
January 2002