Avaya BCM50 Installation Manual download pdf (Page 46)

46 Chapter 2 Introducing the BCM50 hardware

NN40170-305

Figure 10 DTM faceplate

Basic rate interface media bay module

The basic rate interface media bay module (BRIM) connects a maximum of four BRI ISDN loops

to the BCM50 system. The BRIM recognizes only the T-interface used in European networks. To

use the BRIM with the U-interface, typical in North American networks, you require an external

NT1 box to convert the U-interface to a T-interface.

Each BRI ISDN loop you connect adds two telephone lines to the BCM50 system. Therefore, each

BRIM adds a maximum of eight lines to the BCM50 system through the four RJ-48C jacks on the

faceplate. The LEDs beside each RJ-48C jack are on when the ISDN line is active. The figure

BRIM faceplate on page 46 shows the BRIM faceplate LEDs and connections.

Figure 11 BRIM faceplate

Global Analog Trunk Module

The Global Analog Trunk Module (GATM) provides an interface for four or eight analog public

switched telephone network lines. This module supports both pulse and tone dialing, as well as

Caller ID and Disconnect Supervision in selected markets throughout the world.

The GATM uses an RJ-21 connector as the trunk interface. The figure GATM faceplate on page

47 shows the GATM faceplate LEDs and RJ-21 connector. The module is available either in

four-port (GATM4) or eight-port (GATM8) configurations.

Monitor jacks RJ-48C digital

telephone line

connector

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Avaya BCM50 Installation Manual Page 46