Recently i was playing with a Cisco AS2511-RJ which is a 16 port console server to connect to the console port of other devices.
Whilst playing with it, i just wanted a quick guide to the commands to use but struggled to find one…
A good config example that i liked was here: http://ntlogic.net/2012/05/21/cisco-access-server-as2511-rj-config-and-connections/
In a nutshell, you telnet to the device on a different port number. You then link that port number to a serial port on the rear of it.
Once you have the config in place, these commands will help
Open a session:
telnet <ip> <port>
Break from the sessions:
ctrl + shift + 6
Then press X
Show open sessions:
Disconnect (kill) a session:
disconnect <session number>