As businesses move toward hybrid and cloud-based communication systems, integrating Twilio SIP Trunk with HaPBX has become an efficient solution for organizations seeking scalable, cost-effective telephony.
This guide will show you how to set up a Twilio SIP Trunk, configure HaPBX to work seamlessly with it, and enable WebRTC applications for browser-based calling—all within one unified environment.
1. What Is a Twilio SIP Trunk?
A SIP Trunk allows businesses to connect their private branch exchange (PBX) to the public switched telephone network (PSTN) using VoIP technology.
Twilio SIP Trunking offers cloud-based connectivity, enabling global voice communication without the need for traditional phone lines.
Key Benefits of Twilio SIP Trunking:
- Global coverage with local numbers in 100+ countries.
- Pay-as-you-go pricing for cost efficiency.
- Secure, redundant network with built-in encryption.
- Seamless scalability for growing businesses.
When integrated with HaPBX, Twilio SIP Trunk provides a stable, high-performance connection that supports modern unified communications and hybrid work environments.
2. Preparing Your HaPBX Environment
Before configuring Twilio SIP Trunk, ensure that your HaPBX environment is up to date and properly configured. You’ll need:
- Administrative access to your HaPBX Web Interface
- A Twilio account (free trial available at twilio.com)
- A registered SIP domain or IP for inbound/outbound authentication
Step 1: Create Your Twilio SIP Trunk
- Log into your Twilio Console.
- Navigate to Elastic SIP Trunking → Trunks → Create New Trunk.
- Assign a unique name (e.g., “HaPBX-SIP”).
- Configure Termination and Origination settings:
- Termination SIP URI: your HaPBX IP or domain.
- Authentication: IP-based or credential-based.
- Purchase a Twilio phone number to route inbound calls.
Step 2: Configure SIP Trunk on HaPBX
- Go to PBX → External → Trunks → Add New.
- Select PJSIP as the driver (recommended for modern Asterisk versions).
- Enter the following parameters:
-
- Username/Password: your Twilio credentials (if applicable).
- SIP Server: sip.twilio.com
- Transport: TLS or UDP depending on your setup.
- Save and apply changes.
3. Routing and Dial Plan Setup
Once your trunk is registered, you’ll need to define outbound routes and inbound DID rules.
Outbound Route Example
- Dial Pattern: +1XXXXXXXXXX (for U.S. calls)
- Trunk Sequence: Select the Twilio SIP Trunk.
Inbound Route Example
- DID Number: Your purchased Twilio number.
- Destination: IVR, extension, or queue in HaPBX.
You can verify connectivity using the Asterisk CLI command:
| pjsip show registrations |
If successful, the trunk will appear as “Registered.”
4. Installing WebRTC on HaPBX
Beyond SIP trunking, many organizations are now leveraging WebRTC (Web Real-Time Communication) to allow users to make calls directly from a web browser—without softphones or physical handsets.
In this guide, we’ll configure Asterisk 18.01 (bundled within HaPBX) to support WebRTC calling through a browser interface.
The Browser-Phone WebRTC Project can be found at:
👉 https://github.com/InnovateAsterisk/Browser-Phone
Although this project was originally designed for Asterisk 13 & 16, it runs seamlessly on Asterisk 18+ environments.
We will integrate WebRTC using PJSIP instead of the older SIP channel driver, ensuring greater flexibility and better security.
Basic Setup Steps
Clone the Browser-Phone repository:
| git clone
https://github.com/InnovateAsterisk/Browser-Phone |
Install the required packages:
| apt-get install nodejs npm
npm install |
Configure Asterisk for WebRTC:
- Enable DTLS/SRTP in PJSIP settings.
- Update your http.conf and pjsip.conf for WebSocket (ws/wss) transport.
Launch the application and test browser calls using your Twilio SIP trunk.
With this configuration, you can now manage inbound/outbound browser calls directly within your HaPBX system — creating a modern, all-in-one communication hub.
5. Why Choose HaPBX?
While there are many PBX solutions available, HaPBX stands out for its simplicity, flexibility, and enterprise-level reliability.
Top Reasons to Choose HaPBX:
- Cloud-Ready and Scalable: Built to scale from small businesses to large enterprises.
- Unified Interface: Manage SIP trunks, extensions, IVRs, and queues in one place.
- Secure and Reliable: TLS, SRTP, and advanced failover mechanisms.
- WebRTC Integration: Native support for modern browser-based calling.
- Cost Efficiency: Eliminate hardware dependency and reduce telephony costs by up to 60%.
“HaPBX combines the robustness of an enterprise PBX with the flexibility of modern cloud communications—making it ideal for remote teams and distributed businesses.”
6. Common Issues and Troubleshooting
Q1: My Twilio SIP trunk is not registering. What should I check?
- Verify your SIP domain/IP matches Twilio’s configuration.
- Ensure that your firewall allows traffic on ports 5060–5061 (UDP/TLS).
- Use the pjsip show endpoints command to confirm active connections.
Q2: I can make outbound calls, but inbound calls fail.
- Check your DID routing in HaPBX.
- Ensure the Twilio number points to the correct SIP URI.
- Review the Asterisk logs for 403/404 errors.
Q3: WebRTC calls connect but have no audio.
- Confirm that STUN/TURN servers are properly configured.
- Use a valid SSL certificate (self-signed certificates may cause WebRTC failure).
Q4: Can I use multiple Twilio trunks in one HaPBX instance?
Yes. HaPBX supports multiple PJSIP trunks simultaneously, allowing for advanced routing across different providers or regions.
7. Final Thoughts
Integrating Twilio SIP Trunk with HaPBX provides businesses with a powerful, flexible communication backbone—combining the scalability of cloud telephony with the reliability of enterprise PBX features.
By extending your setup with WebRTC, you empower employees to connect from any device, anywhere, without sacrificing call quality or security.
As remote and hybrid work become the norm, HaPBX stands as a future-ready solution that grows with your business—streamlining communication and lowering operational costs.
Choose Your Core License
community share
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Small businesses or startups seeking essential PBX features
free
Server Infrastructure
$10/Month, Shared
We do not limit the number of concurrent calls, these depend on the capacity of the server.
12 Extensions
Unlimited Concurrent Calls
Not Included Core Commercial Features
Not Included Call Center Module
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
2 VitXi Clients
1 Tenants
Support via Forum
Enterprise Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Medium to large businesses requiring advanced features
$100
Includes:
- VM: 8 CPU
- 16 GB RAM
- 200 GB
- 1 Static IP
Server Infrastructure
Value: $100/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Switchboard, Billing, Recording
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
50 VitXi Clients
1 Tenants
Ticket & Forum
Call Center Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Businesses with call centers needing specialized tools
$200
Includes
- VM: 16 CPU
- 32 GB RAM
- 500 GB
- 1 Static IP
Server Infrastructure
Value: $200/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Full Package
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
Included
1 Tenants
Ticket & Forum
Multi-Tenant Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Service providers managing multiple PBX's
$250
Includes:
- VM: 24 CPU
- 64 GB RAM
- 500 GB
- 1 Static IP
Server Infrastructure
Value: $250/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Full Package
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
Included
Multi-Tenant
Ticket & Forum
community share
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Small businesses or startups seeking essential PBX features
free
Server Infrastructure
$10/Month, Shared
We do not limit the number of concurrent calls, these depend on the capacity of the server.
12 Extensions
Unlimited Concurrent Calls
Not Included Core Commercial Features
Not Included Call Center Module
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
2 VitXi Clients
1 Tenants
Support via Forum
Enterprise Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Medium to large businesses requiring advanced features
$1.000
Includes:
- VM: 8 CPU
- 16 GB RAM
- 200 GB
- 1 Static IP
Server Infrastructure
Value: $100/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Switchboard, Billing, Recording
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
50 VitXi Clients
1 Tenants
Ticket & Forum
Call Center Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Businesses with call centers needing specialized tools
$2.000
Includes
- VM: 16 CPU
- 32 GB RAM
- 500 GB
- 1 Static IP
Server Infrastructure
Value: $200/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Full Package
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
Included
1 Tenants
Ticket & Forum
Multi-Tenant Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Service providers managing multiple PBX's
$2.500
Includes:
- VM: 24 CPU
- 64 GB RAM
- 500 GB
- 1 Static IP
Server Infrastructure
Value: $250/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Full Package
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
Included
Multi-Tenant
Ticket & Forum
community share
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Small businesses or startups seeking essential PBX features
free
Server Infrastructure
$10/Month, Shared
We do not limit the number of concurrent calls, these depend on the capacity of the server.
12 Extensions
Unlimited Concurrent Calls
Not Included Core Commercial Features
Not Included Call Center Module
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
2 VitXi Clients
1 Tenants
Support via Forum
Enterprise Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Medium to large businesses requiring advanced features
$2.000
Includes:
- VM: 8 CPU
- 16 GB RAM
- 200 GB
- 1 Static IP
Server Infrastructure
Value: $100/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Switchboard, Billing, Recording
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
50 VitXi Clients
1 Tenants
Ticket & Forum
Call Center Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Businesses with call centers needing specialized tools
$4.000
Includes
- VM: 16 CPU
- 32 GB RAM
- 500 GB
- 1 Static IP
Server Infrastructure
Value: $200/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Full Package
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
Included
1 Tenants
Ticket & Forum
Multi-Tenant Cloud
Our HAPBX-optimized and managed cloud infrastructure allows you to maximize savings on investment and operational costs, while ensuring high performance and security.
Service providers managing multiple PBX's
$5.000
Includes:
- VM: 24 CPU
- 64 GB RAM
- 500 GB
- 1 Static IP
Server Infrastructure
Value: $250/Month
We do not limit the number extensions, these depend on the capacity of the server.
Unlimited Extensions
Unlimited Concurrent Calls
Included Core Commercial Features
Advanced asterisk monitoring software, take the control of your PBX with this powerful tool. You can monitor Queues, Trunks, Outgoing/Incoming Calls, execute actions on calls, and many other functionalities. All the information is in real-time and with low CPU Usage.
Full Package
With VitXi take your extension anywhere in just one place. No individual installs, no individual updates, on the cloud and everywhere you go, all in one place. VitXi is a full WebRTC client with all of the features you need when using HAPBX.
