Nortel Networks BCM1000 manual Trunk media bay modules, Module type What it does Special notes

Chapter 2 Telephony hardware 37

Trunk media bay modules

You install the trunk media bay modules in the BCM1000 or the BCM1000e. Trunk media bay modules connect telecommunications lines to the Business Communications Manager hardware.

These are determined by:

•which lines are available from your telephone service provider

•what lines you require for the types of telephones you want to use

•budget considerations

Table 3 lists the types of trunk media bay modules that are available for the Business Communications Manager system:

Table 3 Trunk media bay modules

Module type	What it does	Special notes
DTM	Connects digital public switched	Can connect to four types of lines: TI,
“Digital Trunk media bay module”	telephone lines to the Business	NA PRI, ETSI (in UK only), and Euro
	Communications Manager system.	PRI.
CTM	Connects a maximum of four analog	Only available for North American
“Caller ID Trunk media bay	public switched telephone lines to the	systems.
module”	Business Communications Manager	See also “4X16 media bay module” on
	system.
		page 44.
CTM8	Connects a maximum of eight analog
“Caller ID Trunk media bay	public switched telephone lines to the
	Business Communications Manager
module”
	system.
BRI	Connects a maximum of four ISDN	Note: The DECT module contains the
“Basic Rate Interface media bay	BRI interfaces	equivalent of a BRI module and does
		not require a separate module for trunk
module”
		line functions.
GATM (Global Analog Trunk	Connects either four (GATM4) or eight	Only North America, Taiwan, UK and
Module	(GATM8) analog public switched	Australia are supported. Modules
(introduced with BCM 3.5	telephone lines to the Business	installed in BCM 3.5 and newer systems
software, but is backward	Communications Manager system.	can be set to automatically download
compatible)		firmware from the Business
		Communications Manager. This allows
		for firmware updates, as required.

Installation and Maintenance Guide