JIKOSHINDANHOSHIKI

摘要

PURPOSE:To confirm the normalcy of a communication control system of single constitution without giving any effect to a using system, by connecting a control part corresponding to an artificial circuit to a circuit common controller set under a spare state via a switch control part. CONSTITUTION:A circuit common controller 2 and a spare circuit common controller 2-1 are connected to a circuit correspondence control part group 1 containing plural circuit correspondence control parts 1-1 via a switch control part 6. Thus a communication control system of single constitution is obtained including a maintenance operation device 4 which gives the switching control to both controllers 2 and 2-1. An artificial circuit correspondence controller 5 is connected to the part 6 in parallel with the group 1. For diagnosis of the working state of the controller 2-1, the controller 2-1 is connected to the controller 5 by the device 4 via the part 6.