| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for changing over a reception person terminal to be called with an intention of a user or a reception person by using only a call button normally provided.SOLUTION: An interphone control apparatus accommodates one or more interphone slave units and a plurality of reception person terminals. In the interphone control apparatus, call control means calls a predetermined first reception person terminal when call operation detection means detects a frist call operation from the interphone slave unit. When the call operation detection means detects a second call operation executed to the interphone slave unit before the called reception person terminal responds to the call, the call control means stops the call of a reception person terminal being currently called, and calls a predetermined second reception person terminal. When the call operation detection means detects a third call operation after call release operation from the interphone slave unit, the call control means calls a predetermined third reception person terminal. |
