System information

RJ-11 (modem)
Pin Signal
1 Unused
2 Tip
3 Ring
4 Unused
5 Unused
6 Unused
RJ-45 (network)
Pin Signal
1 Transmit +
2 Transmit -
3 Receive +
4 Unused
5 Unused
6 Receive -
7 Unused
8 Unused
152 Chapter 9 Connector pin assignments