INS_RLXE4GE24MODMS_REV– 20 Dec 2017 PAGE 17
INSTALLATION AND OPERATION MANUAL
RLXE4GE24MODMS
TECH SUPPORT: 1.888.678.9427
The RLXE4GE24MODMS Series switches support auto MDI/MDI-X operation. You can use a
straight-through cable to connect PC to switch. The following table below shows the 10BASE-T/
100BASE-TX MDI and MDI-X port pin outs.
10/100 Base-T 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
1000 Base-T MDI/MDI-X pins assignment
Pin
Number
MDI port
MDI-X port
1
BI_DA+
BI_DB+
2
BI_DA-
BI_DB-
3
BI_DB+
BI_DA+
4
BI_DC+
BI_DD+
5
BI_DC-
BI_DD-
6
BI_DB-
BI_DA-
7
BI_DD+
BI_DC+
8
BI_DD-
BI_DC-
Note: “+” and “-” signs represent the polarity of the wires that make up each wire pair.
SFP
The Switch has fiber optical ports with SFP connectors. The fiber optical ports are in 100/1000Base-X
multi-mode (0 to 550M, 850 nm with 50/125 μm, 62.5/125 μm fiber) , single-mode and 10 Gbps SFP+
Module with LC connector. Please remember that the TX port of Switch A should be connected to the
RX port of Switch B.
Switch A Fiber Cord Switch B
