Cisco Systems CISCO7201 manual Connecting Console and Auxiliary Port Cables

Chapter 2 Installing the Cisco 7201 Router

Connecting I/O Cables

Connecting Console and Auxiliary Port Cables

Note The console cable kit product number is ACS-2500ASYN.

The Cisco 7201 router has a DCE-mode console port for connecting a console terminal, and a DTE-mode auxiliary port for connecting a modem or other DCE device (such as a CSU/DSU or other router) to your router.

Note Both the console and the auxiliary ports are asynchronous serial ports; any devices connected to these ports must be capable of asynchronous transmission. (Asynchronous is the most common type of serial device; for example, most modems are asynchronous devices.)

The Cisco 7201 router uses RJ-45 ports for both the auxiliary port and the console port.

For console and auxiliary port pinouts for the RJ-45 connector, see Appendix A, “Specifications.”

Table 2-2	Pinouts for the RJ-45-to-DB-25 Adapters
Adapter		DTE M/F Pins1	DCE M/F Pins	MMOD Pins2
1		4	5	5
2		20	6	8
3		2	3	3
4		7	7	7
5		7	7	7
6		3	2	2
7		6	20	20
8		5	4	4

1.The female data terminal equipment (FDTE) adapter that is available from Cisco is labeled “Terminal”.

2.The MMOD adapter that is available from Cisco is labeled “Modem”.

Refer to Table 2-2for a list of the pins used on the RJ-45-to-DB-25 adapters, used with an RJ-45 cable, to connect terminals and modems to the Cisco 7201 router. The cable you use may be a roll-over cable or a straight-through cable.

A roll-over cable can be detected by comparing the two modular ends of the cable. Holding the cables in your hand, side-by-side, with the tab at the back, the wire connected to the pin on the outside of the left plug should be the same color as the pin on the outside of the right plug. If your cable was purchased from Cisco, pin 1 will be white on one connector, and pin 8 will be white on the other (a roll-over cable reverses pins 1 and 8, 2 and 7, 3 and 6, and 4 and 5). (See Figure 2-11.)

	Cisco 7201 Installation and Configuration Guide
OL-11364-04		2-15