Patent ID: 7254414

Claim:
A sound data delivering system having a portable communication terminal and a delivering server that are communicable with each other, said delivering server comprising: request determining means for determining whether a request from said portable communication terminal is a request of a regular sound data or a request of a trial-listening sound data; and data delivering means for delivering the regular sound data to the portable communication terminal with charging a fee to a user of the portable communication terminal if the request from said portable communication terminal is determined to be a request of said regular sound data, and for delivering a trial-listening sound data, which is the regular sound data to which an appending data indicating that the sound data is the trial-listening sound data is added in order to generate the trial-listening sound data, to the portable communication terminal without charging a fee to the user of the portable communication terminal if the request from the portable communication terminal is determined to be a request of said trial-listening sound data, and said portable communication terminal comprising: storage means for storing said delivered regular sound data and said delivered trial-listening sound data; and registration means for, if the sound data stored in said storage means is a regular sound data, registering the sound data as a sound data of an incoming call sound or a background music of said portable communication terminal, or, if the sound data is a trial-listening sound data, refraining from registering the trial-listening sound data as a sound data of an incoming call or a background music of said portable communication terminal, wherein the registration mean is configured to alter the sound data stored in said storage means as the trial-listening sound data from the trial-listening sound data to the regular sound data by erasing said appending data from the sound data and to permit registration of the altered trial-listening sound data if an instruction for purchasing the trial-listening sound data is transmitted from said portable communication terminal to said server.