Newly Designed 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 telephone transponder is designed to prevent information and contact omission. It only needs to be very simple and connected to the telephone line, and can automatically answer the phone when the host is not there, and record the content of the call. According to the owner, due to the different models of the answering machine, there are many other very useful functions. The general answering machine is divided into two parts in structure: the owner's message recording and the incoming message recording.