Library /sys$common/syshlp/nclhelp.hlb set, session_control, outgoing_timer  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Default: 60            Values: 0-65535

    Time (in seconds) to wait for an outgoing transport connection
    to be accepted before Session Control aborts the connection with
    a timed out error. For OpenVMS, a zero (0) value directs Session
    Control to wait indefinitely without aborting the connection.

    Example:

    set session control outgoing timer 60