3Com S7906E Getting Started Manual page 91

10Base-T/100Base-TX
Pin
Signal
4 Reserved
5 Reserved
6 Rx-
7 Reserved
8 Reserved
Tx = Transmit data
Rx = Receive data
BI = Bi-directional data
Table 3-3 RJ-45 MDI-X interface pinouts
10Base-T/100Base-TX
Pin
Signal
1 Rx+
2 Rx-
3 Tx+
4 Reserved
5 Reserved
6 Tx-
7 Reserved
8 Reserved
Pins 1 and 2 (negative), 3 and 6 (positive) are used for external PoE power supply.
Connection procedure
1) Plug one end of the network cable into the Ethernet RJ-45 jack of the switch to be connected.
2) Plug the other end of the cable into the RJ-45 port of the peer device.
Function Signal
— BIDC+
— BIDC-
Receive data BIDB-
— BIDD+
— BIDD-
Function Signal
Receive data BIDB+
Receive data BIDB-
Send data BIDA+
— BIDD+
— BIDD-
Send data BIDA-
— BIDC+
— BIDC-
3-14
1000Base-T
Function
Bi-directional data cable C+
Bi-directional data cable C-
Bi-directional data cable B-
Bi-directional data cable D+
Bi-directional data cable D-
1000Base-T
Function
Bi-directional data cable B+
Bi-directional data cable B-
Bi-directional data cable A+
Bi-directional data cable D+
Bi-directional data cable D-
Bi-directional data cable A-
Bi-directional data cable C+
Bi-directional data cable C-