Installation guide

Cabling Specifications A-81
Ethernet Cable Pinouts
Figure A-17 RJ-45 Connector and Plug
Table A-31 lists the pinouts and signals for the RJ-45 connectors. Refer to the RJ-45 pinout
in Table 5 when selecting proper common-mode line terminations for the unused Category
5, UTP cable pairs 4/5 and 7/8. Wire pairs 4/5 and 7/8 are actively terminated in the RJ-45,
100BaseTX port circuitry in the 100E module. Common-mode termination reduces
electromagnetic interference (EMI) and susceptibility to common-mode sources.
Table A-31 RJ-45 Connector Pinout
Depending on your RJ-45 interface cabling requirements, use the pinouts in Figure A-18
and Figure A-19.
Pin Description
1 Receive Data + (RxD+)
2 RxD–
3 Transmit Data + (TxD+)
6 TxD–
H2936
8 7 6 5 4 3 2 1
RJ-45 connector