a voice - enabled mobile phone fixed line conversion apparatus and particularly a conversion apparatus that enables a fixed line telephone to use mobile phones and has calling identification function mainly includes a conversion device connecting respectively to a fixed telephone line and a mobile phone . the conversion device consists of a microprocessor , a fixed line / mobile phone switch unit , a dtmf decoding unit , a caller identification voice unit , a fixed line detection unit and a mobile phone communication interface . the apparatus allows a fixed line telephone to take phone calls from mobile phones and hear the telephone number of the incoming phone calls .