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
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PRP Auxiliary Port Signals

The auxiliary port on the PRP is a DTE, RJ-45 plug for connecting a modem or
other DCE device (such as a CSU/DSU or another router) to the router. The port
is labeled AUX, as show n in Figure 3-9. The asynchronous auxiliary port supports
hardware flow control and modem control. Table 3-4 lists the signal-to-pin
correspondence for the PRP auxiliary port.
Installing a Flash Memory Card
By default, a Flash memory card containing a valid Cisco IOS software image is
inserted in PCMCIA slot 0 before the router is shipped. (See Figure 3-10.)
PCMCIA slot 0 (SLOT-0) is the bottom slot and slot 1 (SLOT-1) is the top slot.
Both Flash memory card slots on each RP can be used at the same time.
The software configuration register is set to 0x0102, which causes the router to
boot automatically from the Cisco IOS software image stored on the Flash
memory card.
Tab l e 3-4 PRP Auxiliary Port Signals
Auxiliary Port Pin Signal Input/Output Description
1RTS Output Request To Send
2DTR Output Data Terminal Ready
3TxD Output Transmit Data
4GND —Signal Ground
5GND —Signal Ground
6RxD Input Receive Data
7DSR Input Data Set Ready
8CTS Input Clear To Send