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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
Chapter 3 Installing the Router
Connecting to the Console and Auxiliary Ports
Table 3-2
GRP Auxiliary Port Signals
Pin
Signal
Input/Output
Description
1
Signal
Ground
–
Signal Ground
2
TxD
Input
Transmit Data
3
RxD
Output
Receive Data
4
RTS
Input
Request To Send (used for hardware flow
control)
5
CTS
Output
Clear To Send (used for hardware flow
control)
6
DSR
Output
Data Set Ready
7
Signal
Ground
–
Signal Ground
8
CD
Output
Carrier Detect (used for modem control)
20
DTR
Input
Data Terminal Ready (used for modem
control only)
22
RING
Output
Ring