Description
Direction
Signal
Pin
Request to Send (tied to pin 8, CTS)
Output
RTS
1
Data Terminal Ready (always On)
Output
DTR
2
Transmit Data
Output
TXD
3
Ring Indicator
—
GND
4
—
—
GND
5
Receive Data
Input
RXD
6
Unused
Input
DSR
7
Clear to Send (tied to pin 1, RTS)
Input
CTS
8
Auxiliary Port Signals and Pinouts
The following table lists the pinouts of the RJ-45 auxiliary port.
Description
Direction
Signal
Pin
Request to Send
Output
RTS
1
Data Terminal Ready (always On)
Output
DTR
2
Transmit Data
Output
TXD
3
Ring Indicator
Input
RI
4
—
—
GND
5
Receive Data
Input
RXD
6
Data Set Ready/Data Carrier Detect
Input
DSR/DCD
7
Clear to Send
Input
CTS
8
Cisco ASR 1001-HX Router and Cisco ASR 1002-HX Router Hardware Installation Guide
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Port Signals and Pinouts
Auxiliary Port Signals and Pinouts