Nortel Networks R2MFC ユーザーズマニュアル

Chapter 4 Installing the R2MFC MBM 41

R2MFC Media Bay Module Installation and Configuration Guide

Figure 13   How to remove the expansion unit front bezel

5 Grasp the top and bottom edges of the R2MFC MBM. Remove the R2MFC MBM from the 

BCM expansion unit. Place the R2MFC MBM in a clean, safe, and static-free area.

This section describes how to wire the cables that connect to the R2MFC MBM. The R2MFC 
MBM is connected to the CO by either RJ48C or BNC connectors. The BNC connector is the 
default interface. The default connector can be changed either by setting the country - selection 
DIP switches or by creating a custom country code profile through the CLI. See 

 for information on how to change the active interface. 

If the 75 

Ω BNC connector pair is used, two coax cables are required for transmit and receive. 

If the 120 

Ω RJ-48 connector is used, the cable pinout must be set up as follows:

Figure 14   R2MFC MBM RJ48 wiring array 

BCM expansion unit

1. Push against the bottom
2. Pull out from the top

MBM latches

R2MFC MBM 
connector

Receive from 
network

 

1- Rtip

 

2 - Rring

 

3 - Rshield 

Transmit to network

 

4-Ttip

 

5-Tring

 

6-Tshield

RJ48 jack