telnet send
Sends telnet commands to the telnet server. Windows commands reference
On Windows
Windows
sen {ao | ayt | brk | esc | ip | synch | <string>} [?]
To send the Are you there? command to the telnet server, type
sen aytaoSends the telnet command Abort Output.aytSends the telnet command Are You There?brkSends the telnet command brk.escSends the current telnet escape character.ipSends the telnet command Interrupt Process.synchSends the telnet command synch.<string>Sends whatever string you type to the telnet server.?Displays help associated with this command.