| 摘要 |
PURPOSE:To accumulate and reproduce the sound band information and furthermore to accumulate and transfer the information among subscribers, by delivering a write or read permission code obtained by combining multi-frequency signals through a subscriber. CONSTITUTION:A subscriber 10 transmits a telephone number allocated to a trunk device 14 for accumulatio and transfer of sound band information. Then the subscriber 10 is connected to the device 14 by a channel network controller 13 via a channel network 12. A write permission code is received by a receiving circuit 18 and recongized by a code analyzing circuit 20. Then a magnetic tape sound recorder 19 is set under a record state. When the telephone of the subscriber 10 is hooked off, the record tape is rewound. In a read mode a read permission code is transmitted in the same way. This permission code is recognized by the circuit 20, and the recorder 19 is put under a reproduction mode. When the subscriber 10 finishes to listen to the reproduced sounds, the controller 13 delivers a signal to prepare the next request. |
