| 摘要 |
PURPOSE:To simplify operation and to ensure the recognition of response of other party by making transmission of memory dial repeated until response of other party by one operation only in a receiving voice amplification mode. CONSTITUTION:Interruption processing is made at a period of 16.5msec and switching processing is detected. After making control of a contact xp, control of sending of dial pulse to main wires CO1-CO5, detection of incoming from main wires CO1-CO5 etc., data transmitting and receiving to and from telephone sets ST1-ST16. Then, after making issue of command data to sound speakers of telephone sets ST1-ST16 intermittently by a tone signal and the detection of time out, detection of incoming from a door phone DRP, and the detection of time out to release calling state when telephone sets ST1-ST16 do not replay even when calling from the door phone DRP continues for, for instance, 30sec are made. |
