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

    Default:  None         Value: hex-string

    The TSEL for which this image will accept connections. This is
    similar to the destination names attribute. However,
    applications using this access point for in-connection matching
    do not use DNA Session Control protocol.