How It Works
VoiceInfra follows a simple three-step flow from the moment a caller dials to the moment the action is complete.1
Caller dials your number
A caller reaches your phone number, whether that’s a Twilio number, a Telnyx line, a provisioned SIP number, or an extension on your existing PBX. VoiceInfra intercepts the call and routes it to the assigned AI voice agent instantly, with no hold music and no IVR menu to navigate.
2
AI agent handles the conversation
Your AI agent greets the caller with a custom first message, understands their intent using the LLM provider you choose (OpenAI, Anthropic, Gemini, Groq, or Mistral), and responds in under 3 seconds. It draws on your knowledge base — uploaded PDFs, FAQs, or a crawled website, to give accurate, on-brand answers.
3
Actions execute in real time
While the caller is still on the line, your agent triggers real-time actions: updating a CRM record, booking an appointment, sending a Teams message, transferring the call to a human agent, or firing a webhook to your backend. Every call ends with a full transcript, AI-generated summary, and optional post-call email.
What Makes VoiceInfra Different
Traditional IVR systems and standalone voice bots both fall short in different ways. VoiceInfra combines the deep telephony integration of a PBX with the intelligence of modern LLMs.
VoiceInfra does not rely on Twilio or any external WebRTC/RTC provider, we maintain our own SIP infra, thus significantly reducing the call completion cost.
Key Capabilities
PBX-Native Deployment
Register AI agents as standard SIP extensions on 3CX, Yeastar, FreePBX, Asterisk, Vicidial, Issabel, PortSIP, and more. Whitelist one IP address and your agent is live, no carrier switch, no hardware swap. Significant cost savings!
Multi-LLM Support
Choose from OpenAI, Anthropic Claude, Google Gemini, Groq, or Mistral. Assign different models to different agents, switch providers at any time, and bring your own API keys for full cost transparency.
Real-Time Actions
Execute live actions during a call: update CRM records, book appointments, send emails or Teams messages, query external APIs, and trigger webhooks — all without putting the caller on hold.
30+ Languages
Serve callers in their native language with automatic language detection and real-time transcription powered by Deepgram, ElevenLabs, and other leading STT providers. No manual routing required.
Batch Calling Campaigns
Upload a contact list via CSV, configure your AI agent, and launch outbound calling campaigns at scale. A Call Center on steroids! Thousands of outbound calls handles with a fraction of cost.
Analytics & Intelligence
Every call produces a full recording, verbatim transcript, and AI-generated summary. The analytics dashboard surfaces sentiment trends, call outcomes, per-agent performance, and conversion metrics in real time.
Who Uses VoiceInfra
Telecom Operators & MSPs
If you already manage PBX infrastructure for business customers, VoiceInfra seamlessly becomes part of your offering, with zero infrastructure changes. For large scale operators, VoiceInfra talks to your SBC or Core network via standard SIP signaling with support for TCP/TLS/UDP and SRTP for media encryption.Contact Centers
Replace or augment your agent teams with AI that picks up every call instantly. One US–India telecom MSP replaced their entire customer service team with VoiceInfra agents that handle new leads, troubleshoot issues, report incidents, and transfer callers to the right extension — achieving a 99%+ answer rate and sub-3-second response time, 24/7.Businesses Automating Inbound & Outbound Calls
From dental practices booking appointments to real estate firms following up on leads, VoiceInfra handles the full call lifecycle. Inbound Voice AI agents answer questions, qualify callers, and route them intelligently. Outbound Voice AI agents dial contacts from your CRM, deliver messages, and transfer warm leads to your Human sales team the moment they express interest.For Established Web brands
VoiceInfra’s web widget integrates seamlessly into your website, enabling your web pages to speak and interact with visiting users. Visitors can call, chat, or connect with a human agent all from within your web application.VoiceInfra works alongside your existing PBX, SBCs and telephony infra, not instead of it. You keep your carrier, your numbers, and your routing rules. AI agents simply appear as new extensions with extensible functionality. We support normal SIP without authentication, with authentication, with SIP registration.