| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic private branch exchange system which makes it easy to set redialing and enables automatic redialing after a telephone call. SOLUTION: This system has a calling source number storage part 7 which recognizes and stores a calling source telephone number reported from a public network, a call-back management table part 8 which holds associated information between a main wire and an extension telephone set in an incoming call, a call-back control part 9 which performs a process for redialing from an extension side according to the associated information, and call-back buttons CB1 of extension telephone sets A1 to D1, and the call-back control part 9 registers the telephone number of a calling source stored in the calling source number storage part 7 and the number of an extension telephone set currently in a calling state in the call-back management table when the button CB1 is pressed, and makes an automatic connection by automatically calling the calling source according to the information in the call-back management data table 8 when a previously set time is passed after the telephone call ends.
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