Introduction: e-Tone Internet Phone is a type of telecommunication terminal connected with PC using ADSL (broad band) through internet so as to enable people to call desk telephone or even mobile phone. The e-Tone Internet Phone has totally consider people抯 habit of using normal telephone, hence in terms of out looking or the way it is used, it is almost the same as the normal phone when dialing. e-Tone Internet Phone terminal provides a type of telephone number given by the ITU. Sometime in the future the new generation type of this phone will gradually be put into use, namely, it will be possible to dial between internet phones, or dial between internet phone and desk phone or between internet phone and normal mobile phone.