DOCDEV.to AI·4/26/2026
GPT-4o Voice on a Real Phone Line: Connecting OpenAI Realtime API to Actual Calls
This post details the architecture and code to integrate OpenAI's GPT-4o Realtime API with actual phone lines. It addresses the challenges of connecting WebSockets (OpenAI) to RTP/SIP (phone networks) and introduces VoIPBin as an audio translation solution.
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