You can create a command procedure containing the DCL commands
    DEFINE and TELNET (or TN3270) commands.

    You can create initialization command files to customize your
    TELNET/TN3270 sessions with SET, ENABLE, and DISABLE commands.
    These command files:

    o  Are optional. They eliminate the need to enter individual
       TELNET commands.

    o  Have the following requirements:

       -  Location: Your login directory

       -  Name: TELNETINIT.INI

       -  Format: one command per line

    o  Run automatically when you invoke TELNET or TN3270.

    o  Let you specify the logical name, TELNETINIT, to point to an
       initialization file.