This read-write integer sets the Cutoff Decrease Factor (CDF) for a standard ABR connection, a unitless value (0 or a power of 2 up to 64, inverted to get its actual effect) that governs how the source's rate is decreased when it hasn't received expected RM cell feedback within the Trm-based cutoff window. Admins configure this to control ABR behavior specifically for the "no feedback received" scenario, distinct from RDF which handles explicit negative feedback. For example, setting ausmStdABRCDF to 0 would disable this particular cutoff-based rate reduction, while a nonzero power-of-2 value would cause the rate to be cut down when RM feedback goes missing for too long.