Importance

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Abstract

It is an object of the invention to provide a telephone system which is capable of protecting privacy of a manager of a slave unit on an incoming caller telephone number as well as protecting privacy of a manager of a master unit on an incoming caller telephone number. The telephone system of the invention comprises a master unit and at least one slave unit, wherein when incoming caller telephone number data is associated with the master unit, the caller telephone number data is displayed only at the master unit and held in a history storage buffer, and when incoming caller telephone number data is associated with the slave unit, the caller telephone number data is transmitted from the master unit to the associated slave unit to be displayed at the associated slave unit as well as held in a history storage buffer. By inputting a secret number at the master unit, incoming caller telephone number data which is associated with the master unit is displayed/printed, and by inputting a secret number at the slave unit, incoming caller telephone number data which is associated with the slave unit is displayed.

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First Claim