Call us now Nederlands


Want to save costs on your monthly phone bills? Set up more reliable voice connections? Be much more flexible when it comes to scaling up internationally? SIP trunks do just that and more.


What is it?

SIP is short for Session Initiation Protocol. SIP trunks can act as a bridge between a traditional phone line (PSTN) and VoIP. They help you easily set up voice connections with VoIP and route calls across the globe. They’re not a physical device but merely a set of common and widely used internet protocols that facilitate in- and outbound telephony traffic.



Improved reliability and quality

SIP trunks are a reliable way of delivering inbound traffic. Calls are routed over the internet as VoIP, so you can gather, monitor, and act upon a lot of data. This increases the quality and reliability of the connection. Our capacity is virtually unlimited. Any global customer service number can be connected, and calls delivered wherever you like. With SIP trunks you can go global with ease.

sip trunk global voice connections


Save costs

Still using traditional phone lines for outbound calls? And do you handle high volumes of long-distance or international calls? Our platform handles aggregated high volumes of all customers and combines multiple carriers. This means we have a procurement position you can’t obtain on your own. Switching to a Sound of Data SIP trunk lets you take advantage from that benefit.

Download product paper
arrow Tell me more
Live TV (8)

What's more

No costly investments

You don't need any costly hardware to set up SIP trunks. All it takes is connecting your current voice network to the internet.

Maximum reliability

Calls run via our stable and highly secure platform, in a redundant set up in multiple data centers which are monitored 24/7.

Increased quality and security

Significantly increase the quality and security of your calls by setting up a dedicated data connection.

Increased scalability and mobility

SIP trunks can easily be scaled up and down around the globe. And be used to set up and connect new geographic locations.

Always compatible

No need to make changes to your current platform and infrastructure. All your current soft- and hardware is compatible.

Easy management

Adjusting routing, end-points, the number of phone lines is easy as pie with SIP trunks.


Safe and secure

Installing SIP trunks will make sure you’re set up for the future. Without having to worry about security. All communication is secured with industry-standard techniques, such as TLS. Our platform automatically blocks destinations that are often used in fraud or scams for outbound traffic. For networking between endpoints, you can use public internet, or chose a more private connection like VPN, MPLS, or DSL. Both SIP-registration and IP-whitelisting are supported as well. Are you ready for it?

arrow Get in touch
premium numbers applications

I need a SIP trunk

  • This field is for validation purposes and should be left unchanged.