3Com Router Module Guide
Chapter 3 Multifunctional Interface Modules
3-19
Figure 3-22
ROUTER 2-PORT 10/100 MIM panel
The following table describes the LEDs on the /ROUTER 2-PORT 10/100 MIM panel.
Table 3-11
LEDs on the ROUTER 2-PORT 10/100 MIM panel
LED
Description
LINK
OFF means no link is present; ON means a link is present.
ACTIVE
OFF means no data is being transmitted or received on the interface and blinking
means data is being transmitted and/or received.
3.5.4 Interface Cable
I. Ethernet cable
As shown in the following figure, the Ethernet cables for FIC-FE cards are category-5
twisted pairs with RJ-45 connectors. Pins 1 and 2 of the interface are used for
transmitting data, and pins 3 and 6 are used for receiving data.
Figure 3-23
Ethernet cable
II. Making Ethernet cables
You can use category 5 twisted-pair cables to make Ethernet cables. A category 5
twisted-pair cable is composed of eight wires that are identified and grouped by colors
of the outer insulator. Usually a solid color wire and a white/solid color wire are
organized in pairs. But sometimes, wires are also paired by color dots.
Ethernet cables fit into two categories: straight-through and crossover.
z
Straight-through cable: The wires are crimped in the RJ-45 connectors at both
ends in the same order. The cable is used for connecting a terminal device (for