Specifications

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