A television receiver incorporating telephone interface circuitry permitting the viewer to not only answer incoming calls but also place outgoing calls by means of the television receiver is disclosed. An infrared link is used for remote control telephone answering and dial-out with a tuner-integrated...http://www.google.com.hk/patents/US4356509?utm_source=gb-gplus-share專利 US4356509 - Microcomputer-controlled television/telephone system and method therefore
