Modem
device · 1958 · Digital age
Transmits data over a telephone line by modulating a signal.
What it is made of
- Modem chip — has part. It turns bits into tones and back.
- Digital signal processor — has part. Signal processing in high-speed modems.
- Phone line jack — has part. Connection to the telephone line.
Principles and materials it uses
- Telephone — uses. It works over a telephone line.
- Bit and information theory — uses. It encodes bits as sound.
- Silicon — is made of. The chips are silicon.
- Amplitude and frequency modulation — uses. It encodes bits by modulation.