Cable Requirements
The Lantronix LFX2 is compatible with UTP
(unshielded twisted pair) and STP (shielded
twisted pair) cables. EIA category 3,4 or 5
cables can be supported on the RJ45 connec-
tors.
All ports of the LFX2 are configured as MDI-X
ports; Port 2 has an MDI option for connecting to
hubs, repeaters or other switches.
The following cable configuration is suggested
for the cables attached to an LFX2:
LFX2 End
MDI-X
MDI
nodes
ports
ports
Pin 1
TD+
TD+
RD+
TD+
Pin 2
TD-
TD-
RD-
TD-
Pin 3
RD+
RD+
TD+
RD+
Pin 6
RD-
RD-
TD-
RD-
1.
The cable between the LFX2 and an end-
node or another switch is straight through.
2.
The cable between the LFX2 and a hub or
repeater is not straight through but rather a
“crossover” (transmit pairs and receive
pairs are reversed). By selecting the MDI
option (when available), a straight through
cable can be used.
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