High Efficiency SD card telephone voice recorder with Answering Machine, stand-alone SD storage

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.

The answering machine is also called the answering machine. It consists of an automatic answering machine and an automatic recorder. When there is a telephone call, if the host is not present, the answering machine will automatically start and tell the host's message to the other party. And record the other party's message, and the host will operate the answering machine to listen to the other party's message after returning.