Nortel Networks BCM1000 manual Basic Rate Interface media bay module, CTM and CTM8 LEDs and jacks

Chapter 2 Telephony hardware 41

Figure 17 CTM and CTM8 LEDs and jacks

	CTM
	CTM8
Power LED
Status LED
Line 1
Aux
Line 2	Line 1
Line 3	Auxiliary port
Line 4
	Auxiliary port
	Line 5

Basic Rate Interface media bay module

The Basic Rate Interface media bay module (ISDN BRI) module connects a maximum of four BRI ISDN loops (eight lines) to the Business Communications Manager system.

European systems use straight connects to ISDN devices (S interface) or to ISDN trunks from a service provider (T interface). North American-based systems require an external NTI module between the service provider trunk (T-interface) or between the BRI module and the ISDN devices (S interface).

Each BRI ISDN line you connect adds two telephone lines to the Business Communications Manager system. Therefore, each BRI adds a maximum of eight telephone lines to the Business Communications Manager system via the four RJ48C jacks on the faceplate. You can also use this module for dial backup or dial-on-demand services for WAN connections.

Figure 18 shows a front view of the BRI.

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

Figure 18 BRI LEDs and jacks

Front view

Power LED

Status LED

Line 1

Line 2

Line 3

Line 4

Installation and Maintenance Guide