Library /sys$common/syshlp/tcpip$telnet_help.hlb HELP  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    For help with one command, enter HELP plus the command verb or
    the verb and parameter, for example:

       TELNET> HELP SET
       TELNET> HELP SET TERMINAL
       TELNET> HELP ENABLE
       TELNET> HELP ENABLE BINARY

    For a list of available commands, enter ?