Library /sys$common/syshlp/ncphelp.hlb SET, MODULE, X25-PROTOCOL, KNOWN_DTES, RESET TIMER seconds  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Specifies a timer that starts when a reset is transmitted, and
 whose  termination retransmits the reset if no response has been
 received. Specify a value in the range 1 to 255.  By default the
 timer takes the network value specified by the PROFILE parameter.
 See the Public Network Information manual for the network value
 of this parameter.