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Connecting to the Network
6H128-08 and 6H129-08 User’s Guide 3-9
If a crossover is required, but crossover cabling is not available, use the
switch on the FE-100TX to internally cross over the RJ45 port. Figure 3-4
shows how to properly set the FE-100TX crossover switch.
Figure 3-4 FE-100TX Crossover Switch
When connecting a workstation, use a straight-through cable and set the
Fast Ethernet Interface Module crossover switch shown in Figure 3-4 to
the crossed over position marked with X. When connecting networking
devices, such as another bridge, repeater, or router, use a straight-through
cable and set the Fast Ethernet Interface Module crossover switch shown
in Figure 3-4 to the not crossed over position, marked with “=”.
Connect an FE-100TX to a twisted pair segment as follows:
1. Ensure that the device connected to the other end of the segment is
powered ON.
2. Connect the twisted pair segment to the module, by inserting its RJ45
connector into the RJ45 port, shown in Figure 3-4.
3. Verify that a link exists by checking that the port RX LED is on
(flashing amber, blinking green, or solid green). If the RX LED is off,
perform the following steps until it is on:
a. Verify that the device at the other end of the twisted pair segment
is powered up.
b. Verify that the RJ45 connector on the twisted pair segment has the
proper pinouts.
c. Check the cable for continuity.
d. Make sure that the twisted pair connection meets dB loss and cable
specifications for a 100 BASE-TX link as given in the Cabletron
Systems Cabling Guide.
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
5. NC
6. TX-
7. NC
8. NC
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC
5. NC
6. RX-
7. NC
8. NC
FE-100TX
10
16651_05
100
=
x