Nortel Networks BCM1000 manual An example

	Chapter 4		Selecting the media bay modules for your system 59
Table 7 Determining trunk module requirements			(Continued)
		Type of media bay		Number of lines	Number of modules
Type of lines	Number of lines	module		per module	required
BRI ISDN lines		BRI		4 ISDN loops (8	______ BRI
				lines)
Cordless handsets (DECT)		DECT		4 ISDN loops	______ DECT
(selected profiles only)				(requires a full
				DS30 bus)

An example:

•If you require 24 T1 digital lines, you need one DTM because a single DTM can handle 24 T1 lines (North America).

•If you require two analog lines and 24 T1 digital lines, you need one CTM and one DTM.

Note: Although the DTM supports several types of digital lines, you cannot connect different types of lines to the same DTM.

You can add a maximum of three DTMs to your Business Communications Manager system, and only on the BCM1000.

Tip: The BCM1000 can hold three media bay modules. If you require more than three modules, a BCM1000e can be connected to support an additional six additional modules.

Installation and Maintenance Guide