| 摘要 |
PROBLEM TO BE SOLVED: To provide a telephone system for identifying a caller and a receiver by performing the individual authentication of the caller and the receiver in calling and receiving, and ensuring calling security concerning a telephone shared by a plurality of persons. SOLUTION: In the telephone system, a caller side telephone set performs the individual authentication by password and transmits individual identification information to a receiver side telephone set and a receiver side telephone set receives a call, while displaying the individual identification information of the caller, etc. COPYRIGHT: (C)2006,JPO&NCIPI
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