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