Line switching method

Abstract

Abstract PURPOSE:To definitely execute the remote control of a line switching and to prevent an erroneous connection by connecting through a communication line between a network control center and a line switching device and adding a security function to execute the connection permission at the time of using a public network. CONSTITUTION:Nodes 104 and 105 at a B spot and a C spot are connected through a line switching devices 102 and 103 by a communication line 107 and a backup line 108 and a node 104 is connected through the device 102 with a network control center 101 by a communication line 106. At the time of the trouble of a communication line 107, the switching instruction to the line 108 is executed from the center 101 to the device 102 and switching is executed from the line 107 to the line 108. At this time, the device 102 holds the transmitter number of the center 101 beforehand, and checks at the time of calling the center 101. When the public network is used, a security function to execute the connection permission is added to the center 101 and devices 102 and 103 and the erronuous connection is prevented. Thus, the single remotecontrol can be executed for the line switching and the erroneous connection can be prevented.

Inventors

• 👤 Shigeki Satomi
• 👤 繁樹 里見
• 👤 Naonari Ono
• 👤 小野　猶生

Bibliographic Details