摘要 |
PROBLEM TO BE SOLVED: To provide a telephone system in which a caller who is a seller can unhurriedly get a hearing of a caller's explanation by a consumer who is the called party and so that even the called party will not feel waste of time and will not be annoyed. SOLUTION: A telephone set is provided with a charge subtraction button and a signal generator that generates a charge subtraction signal, when the button is depressed. Furthermore, this method adopts a means that stores a program to the main storage of a service control computer of a telephone exchange of a telephone station or a telephone exchange network. The program is used by the telephone exchange, in such a way that when the telephone exchange of the telephone station detects the charge subtraction signal from the telephone of a called party, the exchange subtracts a charge, corresponding to a speech time from the telephone charge of the called party and adds the same amount of the charge as the subtracted charge, to the telephone charge of the caller.
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