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

 Specifies a timer that starts when a restart is transmitted, and
 whose  termination retransmits the restart 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.