164 CHAPTER 4: FLEXIBLE INTERFACE CARDS

Table 113 LEDs on the FIC-E1 and FIC-E1-F panels

LED

Description

 

 

LINK

ON means the carrier signal has been

 

received.

 

OFF means no carrier signal has been

 

received.

ACTIVE

OFF means no data is being

 

transmitted or received on the

 

interface.

 

Blinking means data is being

 

transmitted and/or received.

 

 

Interface Cable Interface cable of the FIC-1E1/FIC-2E1 and the FIC-1E1-F/FIC-2E1-F

Interface cables for the FIC-1E1/FIC-2E1 and FIC-1E1-F/FIC-2E1-F are

G.703-compliant cables, also known as E1 cables. The cables are divided into two categories: 75-ohm unbalanced coaxial and 120-ohm balanced twisted-pair.

75-ohm unbalanced coaxial cable

As shown in the following figure, at the router end of the cable is a DB-15 plug and at the network end are two BNC receptacles.

Figure 200 E1 75-ohm unbalanced coaxial cable

n To extend an E1 75-ohm unbalanced coaxial cable, you can select a pair of coaxial connectors with a BNC receptacle at each end to connect the BNC receptacles of the cable each to a 75-ohm unbalanced coaxial cable with BNC connectors.

120-ohm balanced twisted-pair cable

As shown in the following figure, at the router end of the cable is a DB-15 plug and at the network end is an RJ-45 connector.

Figure 201 E1 120-ohm balanced twisted-pair cable

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3Com MSR 50, MSR 30, MSR 20 manual LEDs on the FIC-E1 and FIC-E1-F panels, E1 120-ohm balanced twisted-pair cable