Connecting A Utp Segment To The Fe-100Tx - Cabletron Systems 2H28-08R User Manual

3.5.2

Connecting a UTP 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 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 3-7 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
crossed over), marked with =.
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
A schematic of a crossover cable is shown in
required, but a crossover cable is not available, use the switch on the
FE-100TX to internally cross over the RJ45 port.
NOTE:
RX+/RX– and TX+/TX–
must share a common
color pair. For example,
the RX+/RX- pair may
use the bw/wb pair, and
the TX+/TX- may use the
ow/wo pair.
Figure 3-8 Cable Pinouts - RJ45 Crossover Cable
2H28-08R SmartSwitch 2208 User's Guide
Figure 3-7
5. NC
6. TX-
7. NC
8. NC
Figure 3-7 FE-100TX Crossover Switch
TO
RJ45 Port
RX+
1
RX– 2
TX+
3
TX–
6
Connecting to the Network
to the straight-through position (not
Position =
(not crossed over)
1. TX+
x
=
2. TX-
10
100
3. RX+
FE-100TX
4. NC
Figure
RJ45 to RJ45
5. NC
6. RX-
7. NC
8. NC
16651_05
3-8. If a cross over is
TO
10BASE-T Device Port
RX+
1
RX–
2
TX+
3
TX–
6
2251-31
3-11