2.2 Configuration for Asynchronous Connections
2.2.3 EXEC connection commands

Use the following EXEC commands to initiate and control a reverse Telnet terminal session to a modem (see the Table for a description):

To make a connection with Telnet protocol

Router>Telnet host [port] [/debug]

To disconnect the specified session or all sessions

Router>disconnect [session-number]

To suspend a session

Router>ctrl-shift-6 x