Bell 103 multi-interface modem
by sv3ora
Brief description
I designed this Bell 103 multi-interface modem, to help me
interconnect different kinds of devices, old or new. The modem has not
been tested but it has been designed carefully from the datasheets of
the microchips. Simplicity was the key issue in this design, but also
multiple features and compatibility with many networks around the
world. If there is interest, let me know and I might produce one in KIT
form sometime. The modem features multiple interfaces and it can
interconnect different devices through different networks such as:
- Land line telephone networks through acoustic coupler
- GSM network through acoustic coupler or direct connection (uses my GSM hack)
- HAM radio transceivers through acoustic coupler (button PTT, uses VOX)
- RS-232 devices, such as retro or new computers, terminals and other gear
- USB devices, such as modern PCs
- UART devices, such as MCUs
- I2C devices, such as sensors and other gear
- Tape drives or other recording/playback media
- Any other device compatible with the above ports and networks
Data is simultaneously
converted from one type of port/network to the other, so more than two
ports/networks can communicate. When one transmits, others must listen
of course, for this to be feasible. The modem is
acoustic-coupler-ready, which overcomes many incompatibilities in
interfacing external devices at any part of the world and at any
network you might use.
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