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

 Specifies the maximum number of attempts to reset an X.25 virtual
 circuit.  If this number is exceeded, the virtual circuit will be
 cleared.  Specify a value in the range 1 to 255.  By default, the
 count takes the network value specified by the PROFILE parameter.
 See the Public Network Information manual for the network value
 of this parameter.