JPS56147555A - Remote monitor controller with interruption function of priority station - Google Patents

Abstract

PURPOSE:To make the tone for telephone callout commonly used for priority station interruption, by providing the tone transmitter to call out the master station from the slave station, outputting the tone signal continuously or discontinuously at normal telephone callout and at production of emergency information selectively, and discriminating the result at the master station. CONSTITUTION:The slave station 7 is provided with the tone transmitter 5 having different frequency from the band as the carrier wave for data transmission transmitted from the slave station remote monitor controller 3. In case of normal telephone call, the telephone call out signal 6 is input to the tone transmitter 5 to transmit the continuous tone to the master station. If the emergent information is produced, the emergent information is detected with the slave station remote monitor controller 3, the interruption signal 4 is output and intermittent tone is transmitted to the tone transmitter 5. The tone receiver 10 judges this tone at the master station 18 and the telephone called out alarm 11 is output if continuous tone, and the slave station interruption signal 12 is transmitted to the slave station callout control circuit 15 if discontinuous tone, to call out the slave station 7 to the remote monitor controller 1.