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3-6 CHAPTER 3: INSTALLING AND SETTING UP THE MODULE
h Check that your cable meets Fast Ethernet specifi-
cations. See Appendix C.
i Replace the cable, and check the Link Status LED
again.
j Contact 3Com Technical Support; see “Support
from 3Com”, in Appendix D.
Jumper Settings
The Module can be easily damaged by electrostatic
discharge. Before handling the module, please
observe safety and electrostatic discharge precau-
tions.
You can configure the TR-in-FE module to operate as
MDI (default) or MDIX. Follow the rules and proce-
dure below. See Figure 3-2.
■ MDI—If TR-in-FE module is connected to another
switch with an MDIX port.
■ MDIX—IIf TR-in-FE module is connected to an end-
station or server.
The MDIX setting provides a crossover, the MDI set-
ting does not.
A crossover cable can be used to connect two MDI or
two MDIX ports together.
Figure 3-2 TR-in-FE Module Jumper Settings
LK1
MDIX
MDI
Port configured
as MDI (default)
Port configured
as MDIX