3Com MSR 50, MSR 30, MSR 20 manual MIM-1VT1 Module, VoIP system, Interface attributes of MIM-1VT1

MIM-1VT1 Module 125

■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 142 Extending E1 120-ohm balanced twisted pair cable

Router

	DB -15
			RJ-45	RJ-45	Voice
					Device
120-ohm balanced				120-ohm E1
		Network interface
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: Check the behavior of the LINK LED on the MIM-1VE1 panel. It is OFF when fault has occurred on the link. In this case, please check the link.

MIM-1VT1 Module

Introduction	1-port T1 voice interface module (MIM-1VT1) can handle dense voice signals in
	VoIP system.
	MIM-1VT1 module is structured in the form of board plus VCPM card plus VPM
	strip. It provides a CT1/PRI port, allowing the access of 24 channels of voice
	signals.
n	■ VCPM is provided to users together with MIM-1VT1. Users can select VPM
	module as needed.
	■ VPM module is installed on the main board of MIM-1VT1.
Interface Attributes	The interface attributes of MIM-1VT1 are given in the following table.
	Table 84 Interface attributes of MIM-1VT1
	Attribute	Description
	Connector	RJ45
	Number of connector	1
	Interface standard	G.703/T1.102
		G.704

AT&T TR 54016

AT&T TR 62411

ANSI T1.403