Dynamic information storage or retrieval – Combined independent audio systems – Radio
Patent
1987-09-17
1989-05-02
Richardson, Robert L.
Dynamic information storage or retrieval
Combined independent audio systems
Radio
379 68, 360 67, H04H 900, H04M 164
Patent
active
048274615
ABSTRACT:
Input coupling apparatus for coupling a telecommunications link, such as a telephone line, to an audio device, such as a recording channel of a telecommunications logger. Input terminals connect the coupling apparatus to the telecommunications link, such as to the tip and ring leads of a telephone line, for receiving audio signals. Voltage, current and remote sensing devices are coupled to the input terminals for detecting an active mode, such as an off-hook condition, during which audio signals are present. When connected to a telephone line, either an off-hook voltage condition or an off-hook current flow is sensed to produce an off-hook signal. When coupled to another communications link, such as a radio link, an external, simulated off-hook signal is detected. A selector is coupled to the voltage, current and remote sensing devices and selects one of those devices to supply the off-hook signal to the audio device, for example, to enable a logger to record audio signals. An audio amplifier is coupled to the input terminals for applying received audio signals to the audio device (e.g. to apply those signals to the recording channel of a logger).
REFERENCES:
patent: 4305101 (1981-12-01), Yarbrough et al.
patent: 4384308 (1983-05-01), Yanagida
patent: 4542427 (1983-09-01), Nagai
patent: 4570190 (1986-02-01), Kitoh
patent: 4580179 (1986-04-01), Sakaguchi et al.
patent: 4625081 (1986-11-01), Lotito et al.
Racal Recorders I.C.R. 64 Voice Communications Recorder.
Dictaphone Corporation
Pitchenik David E.
Richardson Robert L.
Scolnick Melvin J.
Whisker Robert H.
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