A-1
Cisco Catalyst 4900M Switch Installation Guide
78-18350-02
APPENDIX
A

Specifications

Revised: January 4, 2012
This appendix provides cable and power supply technical specifications for the Catalyst 4900M
switches.

Console Port

The console port is an RJ-45 receptacle. The Request to Send (RTS) signal tracks the state of the Clear
to Send (CTS) input. Table A-1 lists the console port pinouts.
NoteA console cable is not provided in the accessory kit. It can be ordered as an option.
Table A-1Console Port Pinouts
PinSignal DirectionDescription
1RTS outputrequest to send
2DTR outputdata terminal ready
3TXD outputtransmit data
4GND — —
5GND — —
6RXD inputreceive data
7DSR inputdata set ready
8CTS inputclear to send