| 摘要 |
<p>PROBLEM TO BE SOLVED: To minimize the number of connection transmission paths by providing a switching information communication device in each switching device and transmitting connection switching information with an address via an operation control signal transmission path. SOLUTION: Each switching information communication device 100 is designed to be able to communicate connection switching information with all of other switching information communication devices via an operation control signal transmission path 40. When the connection switching information with an own address is sent, each switching information communication device 100 operates its own switching device 10 according to contents of the connection switching information. Although an operation control signal transmission path 50 to a transmission/reception part 2 or an instruction part 3 whose connection has not been specified is shut, each switching information communication device 100 is held in a state that it can receive a connection switching signal and its reset signal sent from an adjacent switching information communication device 100.</p> |
