IES-2042P User’s Manual
ORing Industrial Networking Corp.
11
MDI/MDI-X pins assignment
Pin Number
MDI port
MDI-X port
1 TD+(transmit)
RD+(receive)
2 TD-(transmit)
RD-(receive)
3 RD+(receive)
TD+(transmit)
4
Not used
Not used
5
Not used
Not used
6 RD-(receive)
TD-(transmit)
7
Not used
Not used
8
Not used
Not used
Note:
“+” and “-” signs represent the polarity of the wires that make up each wire pair.
4.2 Fibers
The following two models, IES-2042FX-MM, IES-2042FX-SS, have fiber optical ports. The
fiber optical ports are in multi-mode (0 to 2 km, 1310 nm in 50/125 µm, 62.5/125 µm) and
single-mode (9/125 µm) with SC connector. Please remember that the TX port of Switch A
should be connected to the RX port of Switch B.
Switch A
TX RX
RX TX
Switch B
Fiber cord
