telnet internet.address [port]
Telnet starts a remote login on the host specified by internet.address. The option port argument is a number, (typically a high number between 1024 and 9999) that allows you to connect to any number of network games and internet BBS's that support telnet, such as MUD games.

Examples:
  1. Start a remote login on judy.indstate.edu:
    telnet judy.indstate.edu
    or
    telnet judy

  2. Play a little bit of MUD on fred mud:
    telnet fred.indstate.edu 2300
    or
    telnet fred 4000