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

    Default: 8             Value: 0-4294967295

    Number of times a TPDU requiring acknowledgment is to be
    retransmitted before it is assumed that network connectivity
    has failed. This attribute is valid for protocol class 4 only.

    set  [node node-id] osi transport template template-id -
         retransmit threshold integer

    Example:

    set osi transport template osit$loop_clns -
         retransmit threshold 8