In a communication system, a call center is connectable via a communication line to a facsimile apparatus having a printing function. The facsimile apparatus reads ribbon-ID data of an ink ribbon mounted therein, and sends the read ribbon-ID data to the center device. The call center receives the ribbon-ID...http://www.google.es/patents/US7408663?utm_source=gb-gplus-sharePatente US7408663 - Communication system
