| 摘要 |
PURPOSE:To transmit a connection request signal from a terminal station with alternated radio equipment for speech by automatically alternating the function of radio equipment for control with the radio equipment for speech having another frequency classified by every frequency when reception interference is detected. CONSTITUTION:When no carrier is detected in step 3, an operation is migrated to step 15, and it is decided whether or not an interference detecting flag is turned on. In step 20, information representing whether or not frame synchronization is established is inputted, and in step 21, it is judged whether or not the frame synchronization is established. Thus, it is possible to detect the reception interference at the radio equipment for control based on carrier detection and the establishment/non-establishment (the synchronization of transmission and reception at the radio equipment for control) of the frame synchronization, and to stably operate a system. |
