
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 | 
| 
 | 
 | 

| Pin | Signal | 
| 
 | 
 | 
| 1 | Unused | 
| 
 | 
 | 
| 2 | Tip | 
| 
 | 
 | 
| 3 | Ring | 
| 
 | 
 | 
| 4 | Unused | 
| 
 | 
 | 
| 5 | Unused | 
| 
 | 
 | 
| 6 | Unused | 
| 
 | 
 | 
| Pin | Signal | 
| 
 | 
 | 
| 1 | Transmit + | 
| 
 | 
 | 
| 2 | Transmit - | 
| 
 | 
 | 
| 3 | Receive + | 
| 
 | 
 | 
| 4 | Unused | 
| 
 | 
 | 
| 5 | Unused | 
| 
 | 
 | 
| 6 | Receive - | 
| 
 | 
 | 
| 7 | Unused | 
| 
 | 
 | 
| 8 | Unused | 
| 
 | 
 |