Cabletron Systems SEHI100TX-22 - Manual (Page 38)

Chapter 5: Connecting to the Network
5-2 SEHI100TX User’s Guide
Figure 5-1 SEHI Network Ports
3. Check that the applicable LNK LED for the port 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.
c. Check the cable for continuity.
d. Check that the twisted pair connection meets the cable
specifications outlined in Section 3.1.2.
If a link is not established, contact Cabletron Systems Technical Support.
5.1.2 Connecting to an EPIM-100TX
The EPIM-100TX is often used to provide a connection between the
SEHI and a bridge, router, or switch. Normally, in this configuration, a
“straight-through” cable is used and the EPIM crossover switch shown in
Figure 5-2 is set to “not crossed over.”
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 properly set the EPIM-100TX crossover switch.
EPIM 1 5X 4X
3X 2X 1X
16X
15X 14X 13X
12X
EPIM-100TX
LNK
1511_10