The facsimile forms an image based on an image data received through a communication and allows registration of a telephone number specifying a calling device. In the facsimile, the telephone number of the calling device is detected at the time of calling and is referenced to a registered telephone number....http://www.google.de/patents/US6721071?utm_source=gb-gplus-sharePatent US6721071 - Facsimile allowing correct registration of telephone number
