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

 Specifies  the  maximum  amount of elapsed time between the time a
 connection  is received for a process and the time that process
 accepts or rejects the  connection.  For very busy systems, use a
 value in the range of 45 to 60  seconds.  Otherwise use a value of 30
 seconds.  The default is 45.