3Com MSR 20, MSR 30 FIC-8E1/FIC-8E1-F, Connecting the interface cable of the FIC-4E1/FIC-4E1-F

FIC-8E1/FIC-8E1-F 169

Figure 206 Extending an E1 120-ohm balanced twisted-pair cable

Router

DB-15

RJ-45	RJ-45	Network
		devices such
		as DDN

Network interface connector

120-ohm balanced twisted pair 120-ohm E1 trunk cable

Step 4: Power on the router, and check the behavior of the LINK LED on the card: OFF means fault occurs on the line and the signal is not synchronized. Check the line status.

Connecting the interface cable of the FIC-4E1/FIC-4E1-F

Step 1: Select the 4E1/E1 cable appropriate to the type of the port on the to-be-connected device, and correctly set the DIP switch.

■If the impedance of the to-be-connected port is 75-ohm, select E1 75-ohm unbalanced coaxial and 75-ohm 4E1 adapter cables, and set all the BITs of the DIP switch to the ON position (that is, the port impedance is 75-ohm).

■If the impedance of the to-be-connected port is 120-ohm, select E1 120-ohm balanced twisted-pair and 120-ohm 4E1 adapter cables, and set all the BITs of the DIP switch to the OFF position (that is, the port impedance is 120-ohm).

Step 2: Insert the DB-25 connector of the 4E1 adapter cable into the to-be-connected port on the FIC-4E1/FIC-4E1-F and tighten the thumbscrews.

Step 3: Identify the sequence number of the DB-15 connector at the other end of the cable, and connect the connector to an E1 cable.

Step 4: Connect the E1 cable to another device, by reference to the previous subsection.

Step 5: Power on the router, and check the behavior of the LINK LED on the card

panel: OFF means fault occurs on the line and the signal is not synchronized. Check the line status.

FIC-8E1/FIC-8E1-F

Introduction FIC-8E1

FIC-8E1, the 8-port channelized E1/PRI interface card, transmits, receives, and processes eight channels of E1 data traffic. In addition, you can use the card for other purposes, such as CE1 access and the ISDN PRI function.

FIC-8E1-F

FIC-8E1-F, the 8-port fractional E1 interface card, is different from the FIC-8E1 interface card in the sense that: