🌐 Create a SIP Trunk

Customers can connect their own PBX to the platform using a secure SIP Trunk.

Each trunk is built for reliability and redundancy, featuring two SIP registrations (Primary and Secondary) hosted in different datacenters.

This setup ensures seamless operation and automatic failover in case one connection becomes unavailable.

If your PBX is unreachable or malfunctioning, the Trunk Failover feature ensures that calls are never lost.

Incoming calls will automatically reroute to a predefined Failover Dial Plan, so your customers can still reach you — even during outages or connection issues.

⚙️ How to Create a Trunk

🪜 Steps to create a new trunk:

Devices → Trunks.
Click the green ➕ Add button in the upper-right corner.
Fill in all required fields
Click Next Step to display the registration details for your PBX.

🧩 Field Explanations

🔐 IP Whitelist

It is strongly recommended to keep this option enabled.

Add the WAN IP address of your PBX to the whitelist to allow only trusted devices to register on the trunk.

This enhances security by preventing unauthorized access and fraudulent registrations.

☎️ Adding Numbers

Only numbers that are assigned to your company can be added to the trunk.

Select the relevant DID or Caller ID and click the ➕ button to attach it.

⚠️ Failover to Dial Plan

This feature ensures your incoming calls remain accessible even when the PBX is not responding to new call requests (INVITEs) or is offline.

When enabled, calls are automatically rerouted through your Dial Plan, leveraging all standard call-handling features of the platform.

💡 Tip: Make sure to create a Dial Plan before enabling this feature.

🧱 Redundant SIP Servers and Registration Details

Once your trunk has been created, you’ll see all SIP registration settings in the next step.

Each trunk includes both a Primary and Secondary SIP server and user, located in separate datacenters for maximum uptime and failover protection.

The following details will be provided for your PBX setup:

SIP Username and Password
Primary and Secondary SIP Server Addresses