Remote control system for operation over same audiochannel providing voice signals between remote station and base station

作者： Gary A Cannalte

DOI:

关键词: Guard (information security) 、 Base station identity code 、 Remote control 、 Audio signal 、 Base station 、 High amplitude 、 Engineering 、 Electrical engineering

摘要: Remote control system for controlling radio at base station from remote point over single audio channel which provides voice signals between and stations, does not require DC continuity operates within a fixed maximum frequency. A short burst of high amplitude guard tone is applied the to actuate renders controls thereat operative blocks transmission audiosignals channel. The then applies lower tones audiochannel station, with being continuously low level during application station. responds termination (or disconnect tones) provide action, reset permit apply