What are SIP Trunks? #
VoxPria’s SIP Trunk integration enables your AI voice agents to make and receive phone calls using Session Initiation Protocol (SIP) technology. Connect your existing phone numbers from any SIP provider and let your AI agents handle voice conversations seamlessly.
Key Benefits #
Use Your Existing Phone Numbers #
Keep your current phone numbers from any SIP provider. No need to port or transfer – simply connect them to VoxPria and start making calls with your AI agents.
Flexible Provider Support #
VoxPria works with multiple SIP platforms:
- ElevenLabs SIP – Full-featured solution for both inbound and outbound calling
- OpenAI SIP – Leverage GPT-4o Realtime for natural conversations
- Generic SIP – Connect any standard SIP provider
Complete Call Management #
- Handle incoming calls with AI agents
- Make outbound calls programmatically
- Run automated voice campaigns
- Access detailed call logs and recordings
How It Works #
Simple 3-Step Process #
- Create a SIP Trunk
Configure your connection to your SIP provider with authentication credentials and server details.
- Import Phone Numbers
Add your existing phone numbers and associate them with your configured trunk.
- Assign AI Agents
Link phone numbers to your AI agents and start handling calls automatically.
Supported Features by Provider #
ElevenLabs SIP #
- ✓ Inbound calls
- ✓ Outbound calls
- ✓ Voice campaigns
- ✓ Call recordings
- ✓ All agent types
- ✓ Per-number provisioning
OpenAI SIP #
- ✓ Inbound calls
- ✗ Outbound calls
- ✗ Voice campaigns
- ✗ Call recordings (WebRTC browser-based)
- ⚠ Natural agent types only
- ⚠ Project-level provisioning
Generic SIP Providers #
- ✓ Inbound calls
- ✓ Outbound calls (provider dependent)
- ✓ Standard SIP features
- ⚠ Feature availability depends on provider
Common Use Cases #
Customer Support Lines #
Set up dedicated phone numbers for customer inquiries, with AI agents providing 24/7 support and intelligent routing.
Sales and Lead Generation #
Run outbound calling campaigns to qualify leads, schedule appointments, or conduct surveys at scale.
Appointment Reminders #
Automatically call customers to confirm appointments, send reminders, or collect feedback after service.
Order Status and Tracking #
Enable customers to call and check order status, delivery times, or request changes through voice interaction.
Security and Reliability #
Enterprise-Grade Security #
- TLS encryption for all SIP communications
- Webhook signature verification
- Credential protection with secure storage
- IP allowlisting support
Built-in Reliability #
- Automatic failover capabilities
- Rate limiting to prevent abuse
- Comprehensive error logging
- Real-time call monitoring
Getting Started #
Ready to enable phone calling for your AI agents? Start with our Quick Start Guide to set up your first SIP trunk in minutes.
Need help choosing a provider? Check our Supported SIP Providers documentation for detailed comparisons and recommendations.
