OpenPayphone – open-source guts for a 1996 coin payphone (Pi and SIP)

In plain words

OpenPayphone replaces the internal electronics of a vintage 1996 coin payphone with Raspberry Pi and SIP technology to create a functioning internet-connected phone. Built entirely from open-source components, it lets developers and hobbyists transform retro payphones into working communication devices. The project is designed for those interested in telecommunications hardware, nostalgic tech projects, or exploring alternative phone systems. Code and documentation are available on GitHub.

written from the facts on this page · September 2026

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