| 摘要 |
PURPOSE:To decrease the amount of a program controlling the interruption service by preparing a general-purpose program informing an interruption to a subscriber during talking. CONSTITUTION:When the 3rd party offers an interruption request in the state 1 when a subscriber A is talking with a subscriber B, an interruption notice program 19 is started and the subscriber A is brought into the state 21 of tone connection. The said state restores to the original state after a prescribed time. The subscriber A transits to the holding state 2 against said notice by a flash 6 and allows the operation 24 conducting interruption reception to execute the interruption enable notice 25 to a subscriber C. The subscriber C is in the processing completion waiting state 22 after the generation of interruption request, finishes the control by interruption enable detection 26, then the control transits to the subscriber A and the state is brought into the state 5 representing the interruption notice. Since the interruption service program is solely brought into a specific state in this way, the amount of program is reduced. |
