This summary provides a concise overview of the text, highlighting key points without using lists or code. The article describes how to create a real-time phone call transcription system using Node.js, AssemblyAI, and Twilio. It guides readers through setting up a WebSocket server for Twilio media streams, creating an Express.js application with ws module, and integrating AssemblyAI's real-time transcription service to transcribe the audio into text in real-time. The article also provides a step-by-step guide on how to test the system and use it as a starting point for building various voice applications.