We registered with the TPS a few years ago, and the number of sales calls went down from several each day, to a handful per month.
Unfortunately the numbers have gradually crept back up since then, but still not as many as we were getting at the peak.
Currently we're getting lots of sales calls from the uk, from companies trying to flog us solar voltaic panels, although they usually claim it is a survey, (surveys being exempt from TPS).
We can't even ignore International calls now, because calls from out local doctors surgery and one or two other businesses we use, now show as International.
One suggestion I've seen to deal with some autodialers, but not tried yet, so I don't know if it works is to record out-of-service tones on the answer machine before the normal message - just the first tone is usually supposed to be sufficient, apparently some dialers are set up to drop the number if they receive these tones. (Google for sit.wav).
Edited by AbandonShip (Sat 25-Feb-12 13:55:35)