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Customupdated Jun 10, 2025 · telecom · support

PSTN Voice Assistant with Real-Time Transcription and Barge-In

A voice assistant that handles inbound and outbound PSTN calls with real-time transcription, supporting barge-in for natural conversation flow. Connects telephony channels to AI voice agents with low-latency streaming and multi-channel support.

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The numbers

latency—

cost / min—

frameworkCustom

The stack

telephonyVonage

speech-to-textDeepgram Nova-3

llmGPT-4o

text-to-speechDeepgram Aura-2

System prompt

No prompt published.

Config

config.json

{
  "barge_in": true,
  "deployment_options": [
    "local",
    "cloud_runtime"
  ],
  "supported_channels": [
    "PSTN",
    "SIP",
    "WebRTC",
    "WebSocket"
  ],
  "real_time_transcription": true
}

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