Audio interface unit enables signals from variety of sources to telephone network or other end user device

摘要

A signal from a microphone, tape recorder or other source are fed to the input panel (3). The input signal is fed to the audio signal processor (5). The signal processor is fed by a mains powered power supply circuit (28). Outputs can be channeled to an internal audio recorder (27), to the output connection panel (4) or via transmitter (8) and receiver (7) circuits to an external mobile telephone (23)