Nortel Networks BCM1000 Benutzerhandbuch

Chapter 2 Telephony hardware

Installation and Maintenance Guide

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

 lists the types of trunk media bay modules that are available for the Business 

Communications Manager system:

Table 3   Trunk media bay modules 

DTM

Connects digital public switched 
telephone lines to the Business 
Communications Manager system.

Can connect to four types of lines: TI, 
NA PRI, ETSI (in UK only), and Euro 
PRI.

CTM

CTM8

Connects a maximum of four analog 
public switched telephone lines to the 
Business Communications Manager 
system.

Connects a maximum of eight analog 
public switched telephone lines to the 
Business Communications Manager 
system.

Only available for North American 
systems.

See also 

BRI

Connects a maximum of four ISDN 
BRI interfaces

GATM (Global Analog Trunk 
Module
(introduced with BCM 3.5 
software, but is backward 
compatible)

Connects either four (GATM4) or eight 
(GATM8) analog public switched 
telephone lines to the Business 
Communications Manager system.

Only North America, Taiwan, UK and 
Australia are supported. Modules 
installed in BCM 3.5 and newer systems 
can be set to automatically download 
firmware from the Business 
Communications Manager. This allows 
for firmware updates, as required.