Optical communication network system and key station optical communication device, optical communication method and communication program

摘要

The key station and double herring roe bureau through optical transmission line and optical supuritsuta, to be connected, two-way communication between the aforementioned key station and the aforementioned double herring roe bureau being the optical communication network system, connects with aforementioned key station and aforementioned optical supuritsuta the aforementioned optical transmission line which, to be the communication pass line of the time usually and connect with aforementioned key station and aforementioned optical supuritsuta differs from the 1st communication pass line and the aforementioned 1st communication pass line which the 2nd communication pass line which and, have, the aforementioned key station, our key station from inner no child bureau of the aforementioned double herring roe bureau fixedWhen period and the signal are not received, our key station and the optical transmission line which communicates between aforementioned optical supuritsuta it has the change section which from the aforementioned 1st communication pass line is changed to the aforementioned 2nd communication pass line with 1+1 non restoration characteristic change system.