Registered Jack (RJ) Pinouts

RJ11 (6P2C - Telephone)

PinNameFunctionType
1Not Used
2Not Used
3TipLine 1 TipSignal
4RingLine 1 RingSignal
5Not Used
6Not Used

RJ12 (6P6C)

PinNameFunctionType
1Tip 3Line 3 TipSignal
2Tip 2Line 2 TipSignal
3Tip 1Line 1 TipSignal
4Ring 1Line 1 RingSignal
5Ring 2Line 2 RingSignal
6Ring 3Line 3 RingSignal

RJ45 (8P8C - T568B Ethernet)

PinNameFunctionType
1TX+Transmit Data+ (White/Orange)Signal
2TX-Transmit Data- (Orange)Signal
3RX+Receive Data+ (White/Green)Signal
4BI_D3+Bidirectional+ (Blue)Signal
5BI_D3-Bidirectional- (White/Blue)Signal
6RX-Receive Data- (Green)Signal
7BI_D4+Bidirectional+ (White/Brown)Signal
8BI_D4-Bidirectional- (Brown)Signal

RJ48 (8P8C - T1/DS1)

PinNameFunctionType
1RX RingReceive RingSignal
2RX TipReceive TipSignal
3Not Used
4TX RingTransmit RingSignal
5TX TipTransmit TipSignal
6Not Used
7Not Used
8Not Used