Rapid switching system in a radio transmission system with a plurality of the main transmission systems and by means of a plurality of reserve transmission systems via.

摘要

PURPOSE:To attain switching within a specified time even when plural active lines are faulty at the same time allowing other computer to monitor remaining active lines when the lines are switched to the standby lines and switching the standby lines of the other computer in case of fault. CONSTITUTION:A monitor switching means 20 is provided to computers 1-F, in which when N/F active lines monitored by its own computer are faulty, one standby line of its own computer is selected and the remaining (N/F-1) active lines in case of changeover to the standby line are monitored by the other computers not selected to the standby line together with the active lines monitored by them and in case of a fault, one standby line of the other computer is selected. Thus, even when plural active lines are faulty at the same time, the switching time is nearly equal to the case with the provision of one standby line and high speed switching is applied.