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RJ45 (10-pin) to DB9 (F) Cable Wiring
RJ45 Plug Pin 1
Moxa
EtherDevice
Server
RJ45
Connector
DCD
DSR
RTS
GND
TxD
RxD
CTS
DTR
COM Port
Female DB9
Connector
DCD
DTR
CTS
GND
RxD
TxD
RTS
DSR
Cable Wiring
1
2
3
4/7
5
6
8
9
1
6
7
5
3
2
8
4
10/100/1000BaseT(X) Ethernet Port
Connection
The 10/100/1000BaseT(X) ports located on switch’s front panel are used to
connect to Ethernet-enabled devices. Most users will choose to configure
these ports for Auto MDI/MDI-X mode, in which case the port’s pinouts are
adjusted automatically depending on the type of Ethernet cable used
(straight-through or cross-over), and the type of device (NIC-type or
HUB/Switch-type) connected to the port.
In what follows, we give pinouts for both MDI (NIC-type) ports and MDI-X
(HUB/Switch-type) ports. We also give cable wiring diagrams for
straight-through and cross-over Ethernet cables.
10/100Base T(x) RJ45 Pinouts
MDI Port Pinouts
MDI-X Port Pinouts
8-pin RJ45
Pin Signal
Pin Signal
1 Tx+
1 Rx+
2
Tx-
2 Rx-
3 Rx+
3 Tx+
6
Rx-
6 Tx-
1000BaseT RJ45 Pinouts
Pin
MDI
MDI-X
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-
1
8
1
8
