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Cisco - Connecting a Terminal to the Console Port on Catalyst Switches
Console Port Mode Switch
The console port mode switch allows you to connect either a terminal (DTE) or a modem (DCE)
depending on the mode that is selected and the cable that you are using.
Note: The cable and adapters shipped with the Supervisor Module II G and Supervisor Module III G are
the same ones used on the Cisco 2500 series routers (and other Cisco products).
Use the console port mode switch as follows:
Mode 1: Press to the in position. Use this mode to connect a terminal to the port using the console
cable and DTE adapter (labeled "Terminal") that shipped with the Supervisor Engine. You may
also use this mode to connect a modem to the port using the console cable and the DCE adapter
(labeled "Modem") that shipped with the switch.
Mode 2: Depress to the out position. Use this mode to connect a terminal to the port using the
Supervisor Engine III console cable (not provided).
Figure: EIA/TIA-232 RJ-45 Adapter Cable Connector
Table F-1: Console Port Signaling and Cabling Using a DB9 Adapter
Switch
RJ45-RJ45
Console
Rollover Cable
(DTE)
RJ45
Signal
Pin
RTS
1¹
DTR
2
TxD
3
GND
4
GND
5
RxD
6
DSR
7
CTS
8¹
¹Pin 1 is connected internally to Pin 8.
Table F-2: Console Port Signaling and Cabling Using a DB25 Adapter
http://www.cisco.com/warp/public/473/9.html (12 of 19) [9/4/2003 12:36:03 PM]
RJ45-to-DB9
Adapter
RJ45
DB9 Pin
Pin
8
8
7
6
6
2
5
5
4
5
3
3
2
4
1
7
Terminal
(DTE)
Signal
CTS
DSR
RxD
GND
GND
TxD
DTR
RTS