OPERATING DATA CONVERSION SYSTEM

PURPOSE:To register and convert an operating data of other private branch of exchange via a common line signal line from one maintenance terminal equipment of a private branch of exchange being a master exchange by providing a transfer means transferring a maintenance command from the maintenance terminal equipment to a central processing unit of the private branch of exchange via the common line signal line. CONSTITUTION:A common line maintenance command transfer means 22 transferring a maintenance command from a maintenance terminal equipment 40 is provided to a central processing unit 20 of a master exchange 1 being a private branch of exchange via a common line signal line 50. When a specific connection signal is sent from the maintenance terminal equipment 40 of the master exchange 1, the signal is given to the central processing unit 60 via a line circuit, a master channel switch 10 is controlled by the central processing unit 60 to receive the maintenance command from the maintenance terminal equipment 40. Thus, in case of registering and converting the operating data of the private branch of exchange connected to the common line signal line, the connection of the maintenance terminal set to each private branch of exchange is not required when the maintenance terminal sets are centralized.