Connecting the SEH100TX-22 to the Network
SEH100TX User’s Guide 5-3
The EPIM-100TX is also used to provide another RJ45 port to connect to
a UTP segment. Before connecting a segment to the EPIM-100TX, check
each end of the segment to determine if the wires have been crossed over
for the proper connection. If the wires do not cross over, use the switch on
the EPIM-100TX to internally cross over the RJ45 port. Refer to
Figure 5-2 to set the EPIM-100TX crossover switch.
Figure 5-2 EPIM-100TX Crossover Switch
Connect an EPIM-100TX to a twisted pair segment as follows:
1. Connect the twisted pair segment to the module by plugging the RJ45
connector on the twisted pair segment into the RJ45 port on the
module. See Figure 5-2.
2. Plug the RJ45 connector at the other end of the twisted pair segment
into the other device as appropriate.
3. Check that the LNK LED on the EPIM-100TX is on. If the LED is off,
perform each of the following steps until it is on:
a. Check that the 100BASE-TX 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.
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC
5. NC
6. RX-
7. NC
8. NC
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
5. NC
6. TX-
7. NC
8. NC
1511_11