ADAPTER END -- NETWORK END ADAPTER END -- NETWORK END
RJ-45 to RJ-45 RJ-45 to RJ-11
3 ------------- 3 TD- 3 ------------- 2
4 ------------- 4 RD+ 4 ------------- 3
5 ------------- 5 RD- 5 ------------- 4
6 ------------- 6 TD+ 6 ------------- 5
1,2,7,8 1,2,7,8 1,2,7,8 1,6 <-- Not used