DescriptionDirectionSignalPin
Request to Send (tied to pin 8, CTS)OutputRTS1
Data Terminal Ready (always On)OutputDTR2
Transmit DataOutputTXD3
Ring Indicator
—
GND4
——
GND5
Receive DataInputRXD6
UnusedInputDSR7
Clear to Send (tied to pin 1, RTS)InputCTS8
Auxiliary Port Signals and Pinouts
The following table lists the pinouts of the RJ-45 auxiliary port.
DescriptionDirectionSignalPin
Request to SendOutputRTS1
Data Terminal Ready (always On)OutputDTR2
Transmit DataOutputTXD3
Ring IndicatorInputRI4
——
GND5
Receive DataInputRXD6
Data Set Ready/Data Carrier DetectInputDSR/DCD7
Clear to SendInputCTS8
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Port Signals and Pinouts
Auxiliary Port Signals and Pinouts