Connecting A Twisted Pair Segment To The Fe-100Tx - Cabletron Systems 2208 User Manual

Chapter 3: Installation
3.6.1 Connecting a Twisted Pair Segment to the
FE-100TX
To ensure proper operation, use only Category 5 Unshielded
NOTE
Twisted Pair (UTP) cabling that has an impedance of 85 to
111 ohms.
An FE-100TX installed in port slot 7 and/or 8 has an internal crossover
switch. When connecting a workstation, use a straight-through cable and
set the Fast Ethernet Interface Module crossover switch shown in
Figure 3-6 to the straight-through position marked with =. To connect
networking devices, such as another switch, repeater, or router, use a
crossover cable or flip the crossover switch to the crossed over position
marked with an X as shown in
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
A schematic of a crossover cable is shown in
not cross over, use the switch on the FE-100TX to internally cross over
the RJ45 port.
RJ45 Port
RX+
RX–
TX+
TX–
Figure 3-7 Cable Pinouts - RJ45 Crossover Cable
Page 3-8
Figure
5. NC
6. TX-
7. NC
8. NC
Figure 3-6 FE-100TX Crossover Switch
1
2
3
6
RJ45 to RJ45
2H22-08R SmartSwitch 2208 User's Guide
3-6.
Position =
(not crossed over)
1. TX+
x
=
2. TX-
10
100
3. RX+
FE-100TX
4. NC
Figure
10BASE-T Device Port
5. NC
6. RX-
7. NC
8. NC
16651_05
3-7. If the wires do
RX+
1
RX–
2
TX+
3
TX–
6
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