How It Works
VoiceInfra follows a simple three-step flow from the moment a caller dials to the moment the action is complete.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.
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.
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.| IVR | Voice Bots | VoiceInfra | |
|---|---|---|---|
| Sounds natural | ❌ Robotic menus | ⚠️ Varies | ✅ Human-quality speech |
| Understands free speech | ❌ Press-1 only | ✅ Yes | ✅ Yes |
| Works on your PBX | ✅ Native | ❌ Separate system | ✅ Registers as SIP extension |
| Zero hardware changes | ❌ Often requires changes | ❌ Needs carrier swap | ✅ Always |
| Real-time actions | ❌ No | ⚠️ Limited | ✅ Full API & MCP support |
| Multi-LLM flexibility | ❌ No | ⚠️ Usually locked in | ✅ 5 providers, switch anytime |
| Multilingual | ⚠️ Pre-recorded only | ⚠️ Limited | ✅ 30+ languages |
| Analytics & transcripts | ❌ Basic logs | ⚠️ Varies | ✅ Full dashboard |
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.
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. One Spanish telecom operator runs 500+ daily outbound calls with a 30%+ live-transfer rate across 5 languages.
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 becomes a white-label AI layer you can resell. A 30-year telecom MSP in Sydney added VoiceInfra to their Enreach-hosted PBX offering and created a new recurring revenue line across legal, asset management, and professional services — with zero infrastructure changes.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 agents answer questions, qualify callers, and route them intelligently. Outbound agents dial contacts from your CRM, deliver messages, and transfer warm leads to your sales team the moment they express interest.VoiceInfra works alongside your existing PBX — not instead of it. You keep your carrier, your numbers, and your routing rules. AI agents simply appear as new extensions.