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Gamma Product Icon - Unified Communicati

Using Gamma's award winning range of communication services, including Video and messaging, as well as conferencing solutions, we can help keep your business connected, increasing productivity whilst reducing costs.

Gamma's Unified Communications include:

  • Horizon Collaborate

  • Business Phone System

  • Cloud Contact Centre

  • Microsoft Teams Direct Routing

Learn More

Click here to find out about Horizon and how it could work for you.

SIP Trunking & Call Management 

Click here to find out about how you could save money with SIP Trunks.


Click here to find out more about connectivity solutions such as Broadband and Mobile.

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Gamma SIP Trunks


Reliable voice services with flexibility and continuity

SIP trunking is rapidly replacing ISDN services for inbound and outbound voice calls. Gamma is the UK’s leading SIP trunks provider. Our SIP trunks connect your site’s PBX directly into the Gamma network via an internet connection to carry and terminate your calls across the public telephone network.


With BT due to turn off ISDN in 2025, there’s never been a better time to discover how switching to Gamma SIP Trunking can benefit your business.


Gamma SIP Trunks provide a highly-flexible alternative to ISDN and are compatible with all the leading IP PBX brands in the UK market, giving you peace of mind that your PBX hardware works with the network service.


Compared to ISDN, Gamma SIP Trunks are cheaper on a perchannel basis and more flexible in terms of what telephone numbers you can have and the locations in which you can have them. In addition, they are quicker to install and offer a robust business continuity service that ensures your business never loses any calls.


Any business with a PBX can switch to our SIP trunking service and immediately benefit from a more flexible, less expensive and more resilient phone service.

Get in Touch

Want to know more or book a demo? Get in touch with our team today!

01535 655444

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