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

 Specifies a timer that starts when a request to clear an X.25
 virtual circuit is transmitted, and whose termination retransmits
 the clear request 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.