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

    Default: 3000          Value: 1-65535

    Maximum time (in milliseconds) to wait between sending a message
    and receiving a valid response. If this time expires, the local
    station takes error recovery action. On full-duplex point-to-
    point links, the timer is started immediately when a message is
    sent.

    set [node node-id] ddcmp link link-name retransmit timer integer

    Example:

    set ddcmp link ddcmp-0 retransmit timer 3000