Patent ID: 8014515

Claim:
A communication terminal device connectable to a Public Switched Telephone Network (“PSTN”) and capable of processing voice communication signals or facsimile communication signals, wherein the voice communication signals are processed according to information regarding a designated nation, the apparatus comprising: a telephone network adaptor unit configured to receive incoming analog communication signals via the PSTN and to convert the received incoming analog communication signals into incoming digital communication signals; and a main unit coupled to the telephone network adaptor unit to receive the incoming digital communication signals, and process the incoming digital communication signals as facsimile signals or voice signals, the main unit including a controller, a memory and a telephone circuit unit, the memory storing information regarding physical characteristics of voice signals relating to the telephone circuit unit demanded by the designated nation, wherein, when the main unit processes the incoming digital communication signals received from the telephone network adaptor unit as voice signals, the controller controls the telephone circuit unit so as to change at least one physical characteristic of incoming communication signals, according to the information regarding physical characteristics of voice signals relating to the telephone circuit unit demanded by the designated nation, to generate incoming voice signals, which are output via a speaker.