| 摘要 |
The method provides various services of a private phone switchboard to the subscribers of the station line who have their own passwords. It includes a CPU (10) for loading service time from a service time area (a) by accessing a RAM (30) when an inputted call is DISA (Direct Inward System Access) station line, confirming the password inputted by a station line subscriber, and controlling the switchboard system to offer various services when the password is correct, otherwise to offer normal services to the subscribers of the station line.
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