| 摘要 |
PURPOSE: To cause no disturbance to the talking even though the control information is transmitted and received in a line busy mode. CONSTITUTION: The radio transmission is digitized and multiplexed in time division, and a radio transmission frame which is transferred between a main device 1 and plural terminals 3 is divided into an information communication field and a control communication field. Then the information data and the control data are transferred between the device 1 and the terminals 3 through the information communication field and the control communication field respectively. The communication of these information and control data are carried out independently of each other. |
