| 摘要 |
<p>PURPOSE:To attain conversation with a center device by constituting a system with plural radio base stations and many mobile radio devices connected to the center device. CONSTITUTION:When a transmission request from a mobile radio device 3 is transmitted, it is received by a radio base station 2, information of reception level is added and it is transmitted to the center device 1 together with an identification signal. The center device 1 raises an alarm tone and analyzes a signal form the radio base station 2. When the signal is identified as a communication request signal, a communication regulation signal is transmitted. This signal is relayed by the radio base station 2 and received by a mobile radio device 3. The mobile radio device 3 transmitting a transmission request where the identification signal is coincident releases the restriction of communication, brings amplifiers 34, 38 to the operating state to constitute a channel between the mobile radio device 3 and the center device 1.</p> |
