telnet -a][-e escape char][-f log file][-l user][-t term][host port -a Attempt automatic logon. Same as -l option except ...

telnet [-a][-e escape char][-f log file][-l user][-t term][host [port]]  -a      Attempt automatic logon. Same as -l option except uses          the currently logged on user's name.  -e      Escape character to enter telnet client prompt.  -f      File name for client side logging  -l      Specifies the user name to log in with on the remote system.          Requires that the remote system support the TELNET ENVIRON option.  -t      Specifies terminal type.          Supported term types are vt100, vt52, ansi and vtnt only.  host    Specifies the hostname or IP address of the remote computer          to connect to.  port    Specifies a port number or service name.