VMS Help TCPIP Services, TELNET, Exiting  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    You can end a TELNET or TN3270 session (close the connection) in
    one of the following ways:

    o  At the remote host's system prompt, log out.

    o  At the remote host's system prompt, return to the TELNET or
       TN3270 prompt and disconnect the session, as follows:

       1. At the remote host's system prompt, press the TELNET/TN3270
          escape character (Ctrl/] is the default).

       2. At the TELNET or TN3270 prompt, issue either DISCONNECT or
          close.

1 - Example

    The following example shows two ways to close connections:

    % logout
    %TELNET-S-REMCLOSED, Remote connection closed
    -TELNET-I-SESSION, Session 01, host galaxy, port 23
    TELNET>

    TELNET> EXIT
    $

    % <Ctrl/]>          (characters not echoed)
    TELNET> DISCONNECT
    galaxy.udp.com>
    TELNET> DISCONNECT
    %TELNET-S-LCLCLOSED, Local connection closed
    -TELNET-I-SESSION, Session 01, host galaxy, port 23
    TELNET>