Patent ID: 7634078

Claim:
A communication terminal device including a handset for inputting and outputting voice signals and processing signals according to a physical characteristics specification of a designated telecommunication network corresponding to one or more countries, the device comprising: a controller; a telephone network adaptor unit for converting analog communication signals transmitted and received between a telecommunication network and the communication terminal device into digital communication signals; an interface unit for physically isolating the controller from the telephone network adaptor unit, and transmitting and receiving the converted digital communication signals between the controller and the telephone network adaptor unit; a telephone circuit unit, which transmits the voice signals generated by processing the digital communication signals received from the telephone network adaptor unit to a handset through the interface unit, and, which transmits the digital communication signals generated by processing the voice signals received from the handset to the telephone network adaptor unit through the interface unit; a facsimile unit for processing facsimile signals from the digital communication signals received from the telephone network adaptor unit through the interface unit; and a memory unit for storing information related to the physical characteristics specification of one or more telecommunication networks, wherein the controller determines whether the handset is off-hooked or not, so that the digital communication signals are delivered to the telephone circuit unit when the handset is determined to be off-hooked, and the digital communication signals are delivered to the facsimile unit when the handset is determined not to be off-hooked, wherein the controller reads the physical characteristics specification of the designated telecommunication network and controls the telephone network adaptor unit according to the read physical characteristics specification to change at least one physical characteristic of the analog communication signals so as to be adapted to the physical characteristics specification of the designated telecommunication network, and further controls the telephone circuit unit according to the read physical characteristics specification to change at least one physical characteristic of voice signals so as to be adapted to the physical characteristics specification of the designated telecommunication network.