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Cisco - Connecting a Terminal to the Console Port on Catalyst Switches
Console
RJ-45-to-RJ-45
Port
Rollover Cable
RJ-45
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.
Modem Adapter
Use the RJ-45-to-RJ-45 rollover cable and the RJ-45-to-DB-25 male DCE adapter (labeled
"Modem") to connect the console port to a modem.
serial auxiliary port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 male DCE
adapter.
Table I-3: Port Mode 1: Console Port Signaling and Pinouts (Modem Adapter)
Console
RJ-45-to-RJ-45
Port
Rollover Cable
RJ-45
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.
http://www.cisco.com/warp/public/473/9.html (17 of 19) [9/4/2003 12:36:03 PM]
RJ-45-to-DB-25
Terminal
Adapter
RJ-45
DB-25 Pin
Pin
8
5
7
6
6
3
5
7
4
7
3
2
2
20
1
4
RJ-45-to-DB-25
Modem Adapter
RJ-45
DB-25 Pin
Pin
8
4
7
20
6
3
5
7
4
7
3
2
2
8
1
5
Console
Device
Signal
CTS
DSR
RxD
GND
GND
TxD
DTR
RTS
Table I-3
lists the pinouts for the asynchronous
Modem
Signal
RTS
DTR
TxD
GND
GND
RxD
DCD
CTS