| 摘要 |
PURPOSE:To carry out multiple-address communication without storing picture information by discriminating by a switchboard whether or not communication with a receiving terminal is allowed, by sending out a connection-disabled terminal address to a transmitting terminal, and by transferring information from the transmitting terminal to the receiving terminal. CONSTITUTION:A call made by originating terminal T1 is detected by the switchboard to allow channel control circuit SPC to set bus 1 and after a message from circuit control circuit CC is received by terminal T1, a multiple address is inputted via the ten/key and then sent out to the switchboard. Here, the switchboard decodes this information by circuit CC to set bus 2 through control SPC to receiving terminals R1...Rn, thereby receiving responses as to whether or not connections to terminals R1...Rn can be made. Then, it is discrminated by the switchboard whether or not the communication with terminals R1...Rn is allowed so as to send out connection-disabled terminal address Ri to terminal Ti and circuit SPC transfers information from terminal T1 to terminals R1...Rn. Consequently, multiple address communication can be attained without storing picture information. |
