CONTROL SYSTEM FOR SIGNAL TRANSMISSION

摘要

PURPOSE:To reduce the load of a CPU and to provide the flexibility to a control system for signal transmission by providing an element to store the transmitting phase of each circuit and driving a relay of each line circuit in response to the memory information of said element and a common signal transmission time signal. CONSTITUTION:A telephone TEL is connected to a network NW of an exchange controlled by a program via a current circuit of a line circuit. At the same time, a central controller CC is connected to the NW via a signal reception/distribution device SRD. While FF0-FF2 serving as memory elements provided to the line circuit are connected to the SRD. The transmission signals stored in the FF0-FF2 are applied to AND gates AND0-AND2, and an output is applied to an OR gate OR by the signal given from an inter-circuit. Thus a relay RG is driven. This reduces the load of the controller CC and provides the flexibility to a signal transmission control system.