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

 Applies to DDCMP CONTROL circuits. This parameter sets the
 increment value added to the DYING tributary priority each time
 the scheduling timer expires. Increment must be a decimal integer
 from 0 to 255.  The DYING INCREMENT default is 16.