High Efficiency Single USB telephone recorder with answering machine

Digital telephone answering machine, which converts analog voice signals into digital signals and stores them in the semiconductor chip when recording, and restores the digital signals into analog voice signals when playing, and then sends them out through the line. This kind of recording and playback method does not need tape, has high reliability, and the information location is accurate and convenient for quick query. The price of semiconductor memory is expensive, so the recording time of this answering machine is usually only a few minutes.