Nortel Networks 400 4.0 User Manual

Chapter 2 Introducing the BCM hardware

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The V.92 (or V.90) modem connects the BCM system to the public switched telephone network 
(PSTN), enabling the BCM system to send and receive data. The modem card is standard on North 
American systems, while it is optional for APAC and EMEA. The modem kit consists of a modem 
card, RJ-11 interface, and connector cable. For further information on installation and removal, see 

 and 

 shows the modem components.

Use the modem connection to:

•

manage the BCM system from a different location

•

provide dial-up backup for a WAN card

Figure 19   Modem card and interface

The I/O interface card provides a signal junction between the base function tray, hard disk, power 
supply, and cooling system. 

 shows the I/O interface card and connections.

Main card connector

RJ-11 connector 
(exposed on base 
function tray face)

2-pin connector

To main card modem 
socket connector

Base function tray 
mount points

Modem card 
pin guide