| 摘要 |
PURPOSE:To improve the efficiency of operation for a primary communication circuit, by providing the storing devices of data, data communication devices and storage exchange devices containing exchanges to connect between the storing devices as well as between telephone end offices and an inter-office transmitting circuit to each communication station. CONSTITUTION:Communication stations A and B contains storing devices containing storing devices 7a and 7b which control the writing/reading of data to storage devices 10a and 10b, data communication devices 1a and 1b, and storage exchange devices 3A and 3B containing exchanges 3a' and 3b' which connect between the storing devices, between telephone terminals 2a and 2b and an inter-office transmitting circuit 6 and between the storage devices and the circuit 6 respectively. The exchange 3a' stores temporarily the data given from the device 1a to the device 10a via the device 7a and then stores it to the device 10b via the circuit 6, the exchange 3b' and the device 7b when the circuit 6 is not used by a telephone terminal. Then the exchange 3b' transmits the data stored in the device 10b to the device 1b. When a telephone terminal has a call, the exchange stops temporarily the transmission of data to the circuit 6 to give the preference to the audio communication. Thus a direct operation is secured for the audio communication. |
