Library /sys$common/syshlp/ncphelp.hlb CLEAR, CIRCUIT, INACTIVE_BASE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Applies only to DDCMP CONTROL circuits.  Resets to its default value
 the INACTIVE BASE value in the volatile database, or removes the
 INACTIVE BASE value from the permanent database.