SIP/VoIP phones connect to IP networks using standard RJ45 Ethernet carrying SIP signaling and RTP audio. Most also receive PoE power on the same port.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | TX+ | Ethernet TX+ white-orange | BUS |
| 2 | TX- | Ethernet TX- orange | BUS |
| 3 | RX+ | Ethernet RX+ white-green | BUS |
| 4 | PoE+ | PoE power positive | PWR |
| 5 | PoE+ | PoE power positive | PWR |
| 6 | RX- | Ethernet RX- green | BUS |
| 7 | PoE- | PoE power negative | GND |
| 8 | PoE- | PoE power negative | GND |
SIP/VoIP phones connect to IP networks using standard RJ45 Ethernet carrying SIP signaling and RTP audio. Most also receive PoE power on the same port.