| 摘要 |
PURPOSE:To attain plural transmission stations in cascade or branch connection to one line by sending a transmission control signal having a sensor station ID number before a paging signal from a coding section and allowing a transmission controller to send a transmission monitor signal to a monitor section only when the ID numbers are coincident. CONSTITUTION:A coding section 11 is provided with a means inserting transmission station identification number information to a transmission control signal, and a transmission controller 2 is provided with a detection means detecting the coincidence between transmission station identification number showing by transmission station identification identification number information inserted to an incoming transmission control signal and an identification number added to a transmission station including its own equipment and a control means starting a monitor signal transmission means taking the detection of coincidence by the detection means as a change. Then the transmission control signal resulting from the addition of the transmission station identification signal to a paging signal from a central controller 1 is sent to one 2-way line. Transmission stations A-C in cascade or branch connection to the line send a monitor signal to the central controller 1 when the identification number of its own station is coincident with the identification number represented by the transmission station identification signal. Thus, the transmission station A-C are monitored totally with a simple means. |
