MISCOM8220G Layer 3 Din-rail Industrial Ethernet Switch
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4. Appendix 1
RJ45 interface line sequence
The MISCOM8220G series switches provide up to 16 RJ45 interfaces. In
use, they can be routed to other Ethernet terminal devices via the network
cable (direct or cross) of the switch RJ45 interface. Refer to Figure 3-1 below
for the RJ45 pin number sequence.
Figure 3-1 RJ45 connector pin sequence diagram
Since the RJ45 ports of the MISCOM8220G series switches support the
MDI/MDIX self-identification function of the cable, when the MISCOM8220G
switch is interconnected with other Ethernet terminals, five types of direct
connection cables can be used, or five types of crossover cables can be used.
The choice of cables in our practical use.
When the RJ45 port is 10/100Base-TX, the pin definitions are as shown in
Table 1-1 below.
Table 1-1 10/100Base-TX pin definitions are as follows:
Pin
number
MDI-X signal name
MDI signal name
1
Receive data +(RD+)
Send data +(TD+)
2
Receive data -(RD-)
Send data -(TD-)
3
Send data +(TD+)
Receive data
+(RD+)
6
Send data -(TD-)
Receive data -(RD-)
4,5,7,8
Unused
Unused
When the RJ45 port is 10/100/1000Base-T, the pin definitions are shown
in Table 1-2 below.
Table 1-2 10/100/1000Base-TX pin definitions are as follows:
Pin number
MDI-X signal name
MDI signal name
1
Send/receive data
(TRD1+)
Send/receive data
(TRD0+)
