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