Hi Sally, Sorry to keep bugging you, but this probably won't be the last time :-). The procedure Update_limits in section 4.4 Expiration of Nofeedback Timer ends with the line: Recalculate X as in step (4) of Section 4.3; Should that recalculation include oscillation reduction, if you do oscillation reduction for the receiving a feedback packet case? If it doesn't, then you'll get a different effect for the same input data, depending on whether it came from no feedback timeout or a received feedback packet... Tom P.