Chapter 3 Installing the Router
Connecting to the Console and Auxiliary Ports
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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
GRP Console Port Signals
The console port on the GRP requires a straight-through EIA/TIA-232 cable.
Table 3-1 lists the signal-to-pin correspondence for the GRP console port.
GRP Auxiliary Port Signals
The GRP auxiliary port is a DB-25 plug DTE port for connecting a modem or
other DCE device (such as a CSU/DSU or other router) to the router. The auxiliary
port is located next to the console port on the GRP card. The auxiliary port
supports hardware flow control and modem control. An example of a modem
connection is shown in Figure 3-8. Tabl e 3-2 lists the signal-to-pin
correspondence for the auxiliary port.
Note To maintain Class B EMI compliance, shielded cables must be used on the console
and auxiliary ports of the GRP= and GRP-B=.
Tab l e 3-1 GRP Console Port Pin Signals
Pin Signal Input/Output Description
1GND –Ground
2TxD Output Transmit Data
3RxD Input Receive Data
6DSR Input Data Set Ready (always on)
7GND –Ground
8DCD Input Data Carrier Detect (always on)
20 DTR Output Data Terminal Ready