SIMULTANEOUS COMMUNICATING DEVICE BETWEEN PLURAL TERMINALS

摘要

PURPOSE:To prevent confusion caused by simultaneous utterance of many persons by permitting only one out of terminal units that requested for transmission to make transmission and informing it of the effect. CONSTITUTION:Terminal units 11-14 are connected mutually through a fixed node 20, and each terminal unit 11-14 is provided with a transmitting device, a receiving device and a controlling device that makes giving and receiving of transmission request signals, etc. between the node 20. The speech controlling device 25 drives speech changing switches 21-24 through speech controlling lines 41-44 based on transmission request signals received from each terminal 11-14, and permits only one out of terminal units that gave transmission request to make transmission, and informs the terminal unit of that effect.