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3Com MSR 20, MSR 30, MSR 50 manual Twisted pair cable, you can use network interface connector

Models: MSR 50 MSR 30 MSR 20

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124CHAPTER 3: MULTIFUNCTIONAL INTERFACE MODULES

Figure 140 E1 120-ohm balanced twisted pair cable

If the cable with the resistance of 75-ohm is needed, a 75-ohm-to-120-ohm cable adapter (one end is BNC connector and the other end is RJ-45 connector) which is illustrated in the following figure can be installed.

Figure 141 75-ohm-to-120-ohm adapter (with BNC connector)

 

For cable pinouts, see Low-End and Mid-Range Series Routers Cable Manual.

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■ For the convenience of extending the connection of E1 120-ohm balanced

twisted pair cable, you can use network interface connector.

 

■ E1 120-ohm balanced twisted pair cable, network interface connector,

 

75-ohm-to-120-ohm adapter are optional accessories. Please select one when

 

purchasing a MIM-1VE1 module; by default, they are not provided.

Connecting the Interface Cable

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CAUTION:

■Some measures are taken to protect MIM-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 MIM-1VE1 module and fasten the screws;

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

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3Com MSR 20, MSR 30 Twisted pair cable, you can use network interface connector, E1 120-ohm balanced twisted pair cable
Page 123 Page 125