Nortel Networks Circuit Card User Manual

838

This section contains information on the following topics:

The NTRB21 (DTI/PRI/DCH) TMDI digital trunk card is a 1.5 Mb DTI or 
PRI interface to the CS 1000S, CS 1000M Cabinet, and Meridian 1 PBX 11C 
Cabinet. The NTRB21 card has a built-in downloadable D-channel.

The TMDI feature supports the software changes required for CS 1000S, 
CS 1000M Cabinet, and Meridian 1 PBX 11C Cabinet to use the new TDMI 
pack. The software changes include:

•

a new prompt to replace a function that was handled by a dip switch on 
the NTAK09

•

an extra loadware application to handle Layer 1 

•

a change to the existing loadware files into 32 bit format from the 
original 16 bit format