IVR Phone Tree with LLM Function Calling

An intelligent phone tree system that replaces traditional IVR menus with conversational AI. Uses LLM function calling and state machines to navigate callers through multi-step interactions, identifying callers and routing them through dynamic conversation paths based on their responses.

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The numbers

latency—

cost / min—

frameworkPipecat

The stack

telephonyDaily PSTN

speech-to-textDeepgram Nova-2

llmGPT-4o

text-to-speechElevenLabs Turbo v2.5

System prompt

No prompt published.

Config

config.json

{
  "dial_in": true,
  "dial_out": true,
  "state_machine": "python-statemachine",
  "webhook_enabled": true,
  "function_calling": true
}

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