| 摘要 |
PURPOSE:To ensure a quick switching from the voice response unit to the multi- frequency signal receiver by providing the circuit which detects the last input designation tone of the input designation message. CONSTITUTION:The multi-frequency signals sent from the subscriber are received at multi-frequency signal receivers 51-5m via pre-unit 2 and change-over switches 41-4m and then taken into processor 3. Processor 3 switches 41-4m to voice response unit 6 and then transmits the response indication information to control unti 7. As unit 7 controls voice edition unit 8, the necessary voices are edited to be sent out to the subscriber. When the voice transmission ends and the input indication tone is sent to the subscriber, input indication tone detector circuits 111-11m detect the indication tone and then switches 41-4m to the side of multi-frequency signal receivers 51-5m in order to prepare the receiving action. |
