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  1. howartp

    TrueCall DTMF from Panasonic

    Hello, We've had a TEA308 for several years but with a ridiculous increase in nuisance calls I've just bought a TrueCall blocker. It works ok in shield mode (which just requires unidentified callers to press a key to be allowed straight through) but in whisper mode it doesn't. Whisper mode...

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