Hmm.. how would I aquire such a service? I have a wav of the "disconnected number" tones. Supposedly if you put it on your answering machine, the telemarketer's machine automatically removes your number from their system. The only problem is that I have a voice-mail service set up, and it doesn't work with those. Someone their machine can detect whether or not you've actually picked up on your line by detecting the voltage drop.
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