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Interface Card and Interface Module Manual
H3C MSR 20/30/50 Series Routers
Chapter 2 Smart Interface Cards
2-33
Table 2-22
LEDs for the electrical interface on the left of SIC-1GEC panel
LED
Description
LINK
ON means carrier signal is received;
OFF means no carrier signal is received.
ACT
OFF: No data is being received and transmitted;
Blinking: Data is being received and transmitted.
2.9.5 Interface Cable
The interface cable of SIC-1VE1/SIC-1E1-F is a standard E1 G.703 which has two
types: 75-ohm non-balanced coaxial cable and 120-ohm balanced twisted pair cable.
The following figure illustrates these two types of cables.
z
75-ohm non-balanced coaxial cable
Figure 2-37
E1 G.703 75-ohm non-balanced coaxial cable
75-ohm non-balanced coaxial cable connects SIC-1VE1 with the DB-15 connector and
the network end with the BNC connector.
Note:
A pair of coaxial connectors is available for extending the E1 cable. Both ends of the
connectors are BNC receptacles that can be used to connect two 75-ohm
non-balanced coaxial cables with BNC connectors.
z
120-ohm balanced twisted pair cable
Figure 2-38
E1 G.703 120-ohm balanced twisted pair cable