| 摘要 |
PURPOSE:To evade the interrupt of talking in case of moving to other service area during talking by providing plural radio connection equipments corresponding one to one to portable equipments for each service area, and assigning a different specific channel to each portable equipment. CONSTITUTION:A line controller 3 monitors a reception level of all radio connection equipments 5cA, 5cB, 5cC and sends a radio transmission strop instruction to the radio connection equipment 5cA to interrupt a channel to the radio connection equipment 5cA when the radio connection equipment switching condition is reached. Then, after the reception of an instruction, the radio connection equipment 5cA reaches the reception level monitor state. Then, the line controller 3 sends a radio transmission start instruction to the radio connection equipment 5cB to connect the channel to the radio connection equipment 5cB. Then after the reception of the instruction, the radio connection equipment 5cB starts the transmission through a radio line and a portable equipment 6c and the radio connection equipment 5cB are connected by a radio line 7c'. Thus, even in the movement within plural service areas, talking is attained without notifying the service area. |
