| 摘要 |
PROBLEM TO BE SOLVED: To provide an interphone for calling a resident only when a visitor is a specific person. SOLUTION: Call presence/absence sign data are related to external personal information that has been stored in advance and are stored at a feature storage area 25C of a storage part 25 of a master telephone 20 by the on operation of a target person registration switch 23. While a mode selection switch 21 that the master telephone 20 has is set to a pretend-to-be-out mode and when a call switch 41 is turned on by the visitor, first a feature part is extracted from the actual image of the visitor being acquired by a memory 29 for temporarily acquiring the actual image that is photographed by a camera 42 of a slave telephone 40 at a feature extraction part 33 in a step S41 and is compared with feature part data read from a feature storage area 25C by a judgment part 34. When they match and call sign data are present, a call bell 35 of the master telephone 20 rings (step S43).
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