
Interface Card and Interface Module Manual
H3C MSR 20/30/50 Series Routers
Chapter 2 Smart Interface Cards
2-25
Figure 2-32
Ethernet cable
Ethernet cables fall into two categories: straight-through cables and crossover cables,
specifically,
z
Straight-through cable: the wire sequences of the twisted pair cable crimped in the
RJ-45 connectors at both ends are completely the same. It is used to connect
terminal devices (such as PCs, routers) to Hubs or LAN Switches.
z
Crossover cable: The wire sequences of twisted pair cable crimped in the RJ-45
connectors at both ends are different. It can be used to connect two terminal
devices (such as PCs and Routers).
For the pinouts, identification and making methods of these two kinds of network cables,
see
Low-End and Mid-Range Series Routers Cable Manual
.
2.7.5 Connecting the Interface Cable
Caution:
You should connect a cable to the port with the correct mark. Misplugging is prone to
impair the interface card and even damage the router.
If the SIC has been properly installed, follow these steps to connect the interface cable:
Step 1: Connect the Ethernet port of SIC to a PC or router using a crossover cable and
to a Hub or LAN Switch using a straight-through cable;
Step 2: Check the status of LINK LED on the panel: ON means the link is connected
and OFF means the link is not connected. In the latter case, check the line.
2.8 SIC-1GEC
2.8.1 Introduction
1-port 10/100/1000 Mbps electrical and fiber Ethernet interface SIC card (SIC-1GEC)
has the following functions:
z
Receipt, transmission and processing of GE data stream;