“phone or fax how to use phone or switch to fax”

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• If you inquiring about using fax on the same line as your phones, the HP 640 fax has a distinctive ring feature. With distinctive ring, your phone company’s system would need to determine if the incoming call was a fax or a phone call and send a different ring for faxes that the fax machine would recognize and accept the fax. I recommend contacting your phone company to determine if their equipment supports distinctive ring.

  Answered by HP Team 15 years ago

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