Showing papers on "Base station published in 1968"

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

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

Automatic radiotelephone device

Abstract: 1,115,315 Automatic exchange systems OBEDINENO PROMISHLENO PBEDPRIATIE PO RADIOELEKTRONIKA 9 June, 1965, No 24479/65 Heading H4K In an arrangement comprising a mobile or other subscriber's station linked by radio to a base station connected to the exchange, different high-frequency carriers are employed for the two directions of transmission, being separated by filters at each station, and the receivers being normally operative, and a calling signal from either station energizes its transmitter to relay the signal and also a clearing signal at the end of the call The base station is equipped also with filters for separating and repeating dialling signals, whereas the subscriber's station is similarly equipped for responding to calling and clearing signals