| 摘要 |
PURPOSE:To attain conference communication without deteriorating the economical properties of a communication network by setting a conference call by a specific sponsor terminal to each entry terminal for the conference communication, giving the right of transmission to each entry terminal from the sponsor terminal, delivering the data given from the entry terminals having the right of transmission to each entry terminal and performing the communication only with the sponsor terminal through each entry terminal having the right of transmission. CONSTITUTION:A specific sponsor terminal TA contains a central processor CPU, a memory MEM and plural transmitting/receiving devices TR. The terminal TA can set plural calls to the devices TR via a communication network SN. While the memory MEM includes a memory area M1 which stores the entry terminals having the right of transmission and a memory area M2 which stores the entry terminals waiting for the right of transmission. Then the terminal TA gives the right of transmission to either one of entry terminals TB, TC and TD, and only the entry terminal having the right of transmission can deliver data to other terminals having no right of transmission via the terminal TA. |
