1-1 of 1 Answer
Dear customer, thank you for your question. You just have to press the call block button on the handsets. Please refer to this link for more information: http://help.panasonic.ca/viewing/ALL/KX-TGF350/OI/TGF350_PNQX6715ZA/TGF350_PNQX6715ZA.pdf#page=19
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