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Low volume calls, like appointment reminders from our doctors, dentists, my Dad's alarm monitor, etc., all come through. Sadly, so do politician campaign calls.
I believe the system is designed to recognize numbers that are making a very, very high volume of calls. I believe they also look for calls that are spread across the country.
Anyway, we've had it for several years and never had a problem with missing a call from any legit caller.
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