Call
Deliver natural, human-like phone conversations at scale across your existing PBX and phone numbers. Perfect for inbound customer service, outbound sales, and 24/7 call answering without adding headcount.
Built for Telecom Operators, Contact Centers & MSPs
Turn any PBX extension into an AI Voice Agent
Deploy AI voice agents as SIP extensions on your existing PBX. Works with Asterisk, FreeSWITCH, 3CX, Cisco, Avaya, and any SIP-compatible phone system. Zero hardware changes, zero carrier swaps, zero downtime. Keep your phone numbers and infrastructure. Just add AI.
✓Works with all major PBXs·✓5-minute setup·✓Zero downtime
Overview
What is VoiceInfra?
PBX-native conversational AI platform built for telecom operators, contact centers, and MSPs.
Other AI Platforms
SIP Trunking Only
Connect via trunk, lose control
- Requires SBC reconfiguration and carrier changes
- Must port phone numbers to their platform
- Locked into one AI model and voice provider
- Complex setup with weeks of configuration
- Not designed for MSPs to resell
Traditional IVR
Touch-Tone Phone Trees
Menu hell for your callers
- Callers trapped in "Press 1 for sales" loops
- Zero conversation intelligence or context
- Cannot handle unexpected questions or edge cases
- Professional recording and scripting required
- No integration with CRM or business systems
VoiceInfra
PBX-Native AI Agents
Extensions, not replacements
- Register AI agents as extensions on 3CX, Yeastar, FreePBX, Avaya, Cisco, Mitel
- Keep your phone numbers, carriers, and contracts
- 5+ LLM providers and premium voices. Zero lock-in
- Deploy in 5 minutes. Point your PBX and go live
- Built for MSPs. White-label, multi-tenant, recurring revenue
Built for Enterprise Performance
Real capabilities that transform how businesses handle customer communications - no fake promises, just proven technology.
Fast
Voice Response Time
Low latency conversations with Cartesia, optimized AI routing, and multilingual support
5+
LLM Providers Supported
OpenAI, Anthropic, Gemini, Groq, and more - choose the best model for each use case and language
24/7
Always-On Availability
Never miss another call - AI agents with MCP integration that work when your team sleeps
Quick
Deployment Time
From signup to live AI agent with MCP tools - no months of development or infrastructure changes
Platform Capabilities That Matter
Built on proven infrastructure used by leading enterprises
Calculate your potential savings with our ROI calculator
SIP Integration Ready
Connect to your existing Cisco, Avaya, Mitel, or Asterisk PBX without replacement
MCP Tool Integration
Real-time execution with Microsoft Teams, Asana, Salesforce, and any external system via Model Context Protocol
Global Language Support
Handle customer conversations in multiple languages including Spanish, French, Arabic, and more
Customer Impact
Real results from real deployments
Telecom operators and MSPs are using VoiceInfra to automate calls, create new revenue streams, and replace support teams. No rip-and-replace required.
“We deployed 10 VoiceInfra AI agents on our Yeastar PBX and now run 500+ outbound calls daily with a 30%+ transfer rate across 5 languages. No hardware changes, no carrier switch.”
Spanish Telecom Operator
CNMC-Registered Provider
500+
Daily Outbound Calls
30%+
Transfer Rate
5
Languages
“We resell VoiceInfra AI voice agents on Enreach to our business customers across legal, asset management, and professional services. It created a new recurring revenue line for our MSP.”
30-Year Telecom MSP
Sydney, Australia
30+
Years in Telecom
New
Revenue Line
Zero
Infrastructure Changes
“We replaced our entire customer service team with VoiceInfra AI agents. They handle new leads, troubleshoot issues, report incidents, and transfer callers to the right extension. 99%+ answer rate.”
Telecom MSP
US-India Operations
99%+
Answer Rate
<3s
Response Time
24/7
Coverage
AI Voice Agents That Register as SIP Extensions on Your PBX
Register AI agents as standard SIP extensions on your PBX. Zero hardware changes, zero carrier swaps, zero downtime. Works with your existing call flows, IVR menus, and hunt groups.
5minSetup Time
ZeroDowntime
70%Cost Savings
PBX Extensions
32612WhatsApp
BusinessSIP Integration
DirectDeploy AI agents on existing PBX extensions or WhatsApp Business numbers
Works with all major phone systems: 3CX, Yeastar, FreePBX, Avaya, Cisco, Mitel
5-minute setup with zero downtime - no hardware changes required
Multi-LLM support with 5+ AI providers including OpenAI, Anthropic, and Google
Keep your existing phone numbers and carrier relationships
Enterprise security and full control of your telephony infrastructure
How PBX-Native AI Voice Agents Work
VoiceInfra is the only platform that registers AI agents as SIP extensions inside your PBX. Here is what makes PBX-native different from cloud-only voice AI.
SIP Extension Registration
VoiceInfra registers as a standard SIP extension on your PBX. No SBC reconfiguration, no trunk provisioning, no carrier changes. If your PBX speaks SIP, VoiceInfra works with it.
Keep Your Carrier & Numbers
VoiceInfra sits inside your PBX, not in front of it. Your SIP trunks, PRI lines, and carrier contracts stay exactly as they are - what makes VoiceInfra a Vapi alternative for telecom.
Full Context on Transfer
When an AI agent hands off to a human, the full conversation history, caller intent, and collected data transfer with the call - no repeating yourself.
Unlimited Concurrent Calls
Scale from 10 to 10,000 simultaneous AI-powered calls without adding hardware. Built as an AI phone system for MSPs that need to scale.
Channels
AI Voice Agents Across Every Communication Channel
Deploy your AI phone system on calls, chat, web, and API - all from a single PBX AI integration platform. Consistent AI voice agent experience whether your customers dial a SIP extension, message on WhatsApp, or click a widget on your website.
Chat
Deploy AI-powered conversations across WhatsApp Business and web chat experiences. Handle customer inquiries, schedule appointments, and qualify leads asynchronously with the same AI voice agent intelligence.
Web
Embed voice and chat directly on your site. Visitors start conversations instead of filling out forms. Capture leads, answer questions, and route to the right team member - all through an AI voice agent widget.
API
Build and orchestrate custom communication experiences through a flexible API. Integrate AI voice agents into your existing workflows, CRM, helpdesk, or proprietary applications with full programmatic control.
Your entire tech stack, now with AI
PBX systems, CRMs, APIs, and communication platforms. VoiceInfra connects to the tools you already run your business on.
PBX Systems
Your existing phone systemWorks with popular IP-PBX platforms for seamless AI agent deployment without hardware changes.
3CX
Asterisk
FreePBX
Cisco
Avaya
VitalPBX
CRM Platforms
Sync customer data automaticallyAutomatic call logging, contact updates, and workflow triggers keep your CRM data in sync.
Salesforce
HubSpot
Zoho CRM
Pipedrive
API Integration
Custom workflows & APIsRESTful APIs and webhooks for custom integrations with your existing tech stack.
Twilio
Plivo
Vonage
Telnyx
WhatsApp Business
How VoiceInfra Compares to Other Voice AI Platforms
We are the only PBX AI integration platform that registers AI agents as SIP extensions on your existing phone system. See how we compare to cloud-only voice AI alternatives.
Don't See Your System?
We integrate with 100+ platforms via API. If you use a phone system or CRM, chances are we can connect.
Ask About Your System