Functional Description; Hardware Description; Ntrb21 Tmdi Card - Nortel Enterprise 1000 Reference Manual

Functional description

Hardware description

NTRB21 TMDI card

Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
NTRB21 provides the following features and functions:
• configurable parameters, including A-Law and Mu-Law operation,
digital pads on a per channel basis, and Superframe or Extended
Superframe formats
• AMI or B8ZS line coding
• 1.5 Mb Digital Trunk Interface and 1.5 Mb Primary Rate Interface
• 1.5 Mb Clock recovery and distribution of reference clocks
• DG2 or FDL yellow alarm methods
• card status and alarm indication with faceplate-mounted LED
• automatic alarm monitoring and handling
• Card-LAN for maintenance communications
• loopback capabilities for both near-end and far-end
• echo canceler interface
• integrated trunk access (both D-channel and in-band A/B signaling can
be mixed on the same PRI)
• faceplate monitor jacks for T-1 interface
• configurable D-channel data rate with 64 kbps, 56 kbps or
64 kbps inverted.
• self-test
The NTRB21 TMDI card provides 1.5 MBits Digital Trunk Interface or
Primary Rate Interface functionality on the Succession CSE 1000. The
NTRB21 has a built-in downloadable D-channel.
Note: The NTRB21 can be used together with the NTAK09 DTI/PRI
card (with the NTBK51 downloadable D-channel daughterboard).
NTRB21 DTI/PRI/DCH TMDI card Page 195 of 236