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Pipecat Twilio Daily.co FastAPI

Real-Time Voice AI Agent

Sub-700ms conversational telephone receptionist handling 24/7 inbound patient and customer scheduling with live calendar tool calling.

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Real-Time Voice AI Agent Architecture Diagram

Real-Time Voice AI Agent

Commercial Production Note: This real-time voice telephony architecture powers active commercial inbound voice receptionists and appointment booking systems deployed for businesses via Assembly Minds.

A sub-700ms conversational telephone voice agent designed for enterprise customer support, inbound lead qualification, and real-time appointment scheduling.

Architecture Highlights

  • Audio Transport: Twilio Media Streams bidirectional WebSockets with 8kHz μ-law to 16kHz linear PCM resampling.
  • Voice Pipeline: Silero VAD, Deepgram Nova-2 streaming STT, and Cartesia Sonic TTS.
  • Barge-in Support: Immediate audio frame buffer cancellation when caller interrupts.
  • Tool Execution: Dynamic slot availability check and calendar event creation.

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