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Agent Voice Response
What it is
Agent Voice Response, or AVR, turns an Asterisk PBX into a real-time voice AI agent that accepts caller interruptions. It uses composable microservices with replaceable automatic speech recognition, language-model, and text-to-speech engines. AVR supports Asterisk AudioSocket on Asterisk 18 and later, with FreePBX, VitalPBX, Vicidial, Elastix, and custom dialplans listed as compatible systems. Voice activity detection lets callers speak while the agent is talking, while noise cancellation and echo suppression process audio before it reaches the model. Named providers include OpenAI, Anthropic, Deepgram, ElevenLabs, Google, Ollama, Vosk, Kokoro, Ultravox, OpenRouter, CoquiTTS, and Silero. The system can run fully locally with selected providers, and the maker says caller audio then stays on the network. Stateless Docker microservices can scale behind a load balancer. AVR is free for personal and commercial use, with no license keys or per-minute charge. Setup requires Docker images, provider configuration, and an Asterisk dialplan extension.
For and against
For
- Free for personal and commercial use
- Callers can interrupt the speaking agent
- Supports Asterisk 18 and later
- Can run fully on a local network
- Docker services support horizontal scaling
Against
- Requires Docker and Asterisk dialplan setup
- Self-hosted deployment is required
- Call recording is not supported
The verdict
Agent Voice Response provides a free, self-hosted voice-agent layer for Asterisk environments. Its local deployment options and provider choices suit teams that need interruptible calls without license or per-minute charges.
Who it suits
AVR suits organizations running Asterisk-based telephony for customer support, contact-center automation, healthcare assistants, commerce, learning, or IoT control. It also fits teams wanting local voice processing.
Plans and prices
Free
Free for personal and commercial use · no license keys · no per-minute tax
Read 2 Oct 2026 · agentvoiceresponse.com
On the record
- AI integrations
- Named providers include OpenAI, Anthropic, Deepgram, ElevenLabs, Google, Ollama, Vosk, Kokoro, Ultravox, OpenRouter, CoquiTTS, and Silero.agentvoiceresponse.com · read 2 Oct 2026
- Architecture
- It uses composable microservices with hot-swappable ASR, LLM, and TTS engines.agentvoiceresponse.com · read 2 Oct 2026
- Audio processing
- The product describes AI-powered noise cancellation and echo suppression before audio reaches the model.agentvoiceresponse.com · read 2 Oct 2026
- Cost
- AVR is free for personal and commercial use, with no license keys or per-minute charge; donations are voluntary.agentvoiceresponse.com · read 2 Oct 2026
- Deployment and privacy
- AVR can run fully locally with Vosk or Silero for recognition, Ollama for reasoning, and CoquiTTS or Kokoro for speech synthesis; the maker says caller audio then stays on the network.agentvoiceresponse.com · read 2 Oct 2026
- Product
- Agent Voice Response turns an Asterisk PBX into a real-time, interruptible voice AI agent.agentvoiceresponse.com · read 2 Oct 2026
- Scaling
- The maker describes stateless Docker microservices that can be scaled horizontally behind a load balancer.agentvoiceresponse.com · read 2 Oct 2026
- Setup requirement
- The getting-started instructions call for Docker images, provider configuration, and adding an extension to the Asterisk dialplan.agentvoiceresponse.com · read 2 Oct 2026
- Speech interaction
- Voice activity detection supports caller interruptions while the agent is speaking.agentvoiceresponse.com · read 2 Oct 2026
- Support
- The maker points users to documentation, Discord, GitHub, and an email address for business inquiries and partnerships.agentvoiceresponse.com · read 2 Oct 2026
- Telephony
- It supports Asterisk AudioSocket on Asterisk 18+ and names FreePBX, VitalPBX, Vicidial, Elastix, and custom dialplans as compatible systems.agentvoiceresponse.com · read 2 Oct 2026
- Use cases
- The maker highlights customer support, contact-center automation, healthcare assistants, voice commerce, voice learning, and IoT voice control.agentvoiceresponse.com · read 2 Oct 2026
