DUPLEX CONTROL SYSTEM FOR COMMUNICATING CONTROL EQUIPMENT

PURPOSE:To improve the adaptability for the occurrence of the abnormal condition by stopping the receiving processing and shifting to the holding condition when normal and preliminary communicating control parts are the ones whose detecting data are local numbers and which are sent from local other communicating control part, on the basis of the data for deciding detected by the detecting means when the transmitting data are received. CONSTITUTION:When a normal communicating control part 3a receives transmitting data through a communicating line 5, the part decides whether or not transmitter office number data SA added to a head part 20 are coincident to local numbers. For example, it is decided whether or not the contents of transmitting data are analyzed and local addresses, and when the deciding result is coincident to transmitter local number data and local numbers, the receiving processing by a receiving processing means 12 is stopped, and the receiving processing means 12 is shifted to the holding mode. A preliminary communicating control part 3b, in the processing of the normal communicating control part 3a, decides whether or not normal/preliminary division data are zero and executes the same processing.