Library /sys$common/syshlp/net$mgmt_help.hlb actions, enable_disable, MOP, Circuit  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Toggle buttons in the on state (filled in) represent those MOP
    functions enabled for the circuit.  Toggle buttons in the off state
    (empty) represent those MOP functions disabled for the circuit.

    To enable a function, click on the associated toggle button until that
    button is in the on state.

    To disable a function, click on the associated toggle button until that
    button is in the off state.

    Once you have determined that all the toggle buttons are in their proper
    states, press the CONTINUE button to cause the appropriate Enable and
    Disable commands to be issued.  Or press the CANCEL button to cancel the
    operation.  In either case, you will be returned to the main window.