Antaira Technologies - Industrial Media Converter
IMC-C1000-SFP Series User Manual V1.2
5
2.6 Ethernet Ports
RJ-45 Ports
RJ-45 Ports (Auto MDI/MDIX): The RJ-45 port is auto-sensing for 10/100Base-Tx, or 1000Base-
Tx device connections. Auto MDI/MDIX means that the media converter can connect to another
switch or workstation without changing the straight-through or crossover cabling. See the figures
shown below for the straight-through and crossover cabling schematics.
RJ-45 Pin Assignments (Table 2.3)
Pin Number
Assignment
1
Rx+
2
Rx-
3
Tx+
6
Tx-
The RJ45 port on this industrial Ethernet media converter supports automatic MDI operations. Users
can use straight-through cables (Figure 2.4 & Figure 2.5) for all network connections to PCs, servers,
and other switches or hubs. With a straight-through cable, pins 1, 2, 3, and 6, at one end of the cable,
are connected straight through to pins 1, 2, 3 and 6 at the other end of the cable. The table below
(Table 2.3) shows the 10BASE-T/100BASE-TX/1000BASE-T MDI port pin outs.
Note:
The “+” and “-” signs represent the polarity of the wires that make up each wire pair.
Pin MDI-X
Signal Name
MDI Signal Name
1
Receive Data plus (RD+)
Transmit Data plus (TD+)
2
Receive Data minus (RD-)
Transmit Data minus (TD-)
3
Transmit Data plus (TD+)
Receive Data plus (RD+)
6
Transmit Data minus (TD-)
Receive Data minus (RD-)
Table 2.3
RJ45 Pin Assignments
Table 2.4
Ethernet Signal Pin Outs
