3Com MSR 50, MSR 30, MSR 20 manual VPM module is installed on the main board of FIC-1VT1

206CHAPTER 4: FLEXIBLE INTERFACE CARDS

Connecting the Interface Cable

c

CAUTION:

■Some measures are taken to protect FIC-1VE1 module. Still, you are recommended to install a special lightning arrester at the input end of its connection cable to obtain better lightning protection when the cable is led outdoors;

■Read the mark identifying a port before you connect a cable to it, making sure it is the correct port. Wrong connection tends to damage the MIM and even the Router.

Step 1: Plug the DB-15 connector of the cable into the DB-15 port on the FIC-1VE1 module and fasten the screws;

Step 2: Connect the RJ-45 connector of the cable to:

■The peer device directly, if the resistance of the port to be connected is 120-ohm, and there is no need to extend the cable;

■A network interface connector and then the peer device using another E1 120-ohm balanced twisted pair cable, if the resistance of the port to be connected is 120-ohm, and there is a need to extend the cable, as illustrated in the following figure.

Figure 253 Extending E1 120-ohm balanced twisted pair cable

Router

DB -15

RJ-45	RJ-45	Voice
		Device

120-ohm balanced	Network interface	120-ohm E1
twisted pair cable	connector	trunk cable

■The peer device using a 75ohm-to-120ohm adapter, if the resistance of the peer device is 75-ohm;

Step 3: Power on the Router and check the LINK LED on the FIC-1VE1 panel. It is

OFF when fault has occurred on the link. In this case, please check the link.

FIC-1VT1

Introduction 1-port T1 voice interface module (FIC-1VT1) can handle dense voice signals in VoIP system. It provides a CT1/PRI port, allowing the access of 24 channels of voice signals.

n	■	VCPM is provided to users together with FIC-1VT1. Users can select VPM
		module as needed.
	■	VPM module is installed on the main board of FIC-1VT1.