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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
Chapter3 Installing the Router
Connecting to the Console and Auxiliary Ports
Table3-2 GRP Auxiliary Port Signals
Pin Signal Input/Output Description
1Signal
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
7Signal
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