Our SIP trunking service connects your customers' businesses with our nationwide network, gives access to the PSTN and provides a more flexible and lower cost alternative to ISDN for inbound and outbound voice calls..
SIP (or Session Initiation Protocol) - also known as SIP trunking - is our market-leading and cost-effective replacement for traditional ISDN. It connects your customers' PBX to the PSTN via broadband, Ethernet or private circuit into our national network. Our SIP trunks work seamlessly with each of the leading IP PBX brands in the UK market.
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. Try our SIP v ISDN cost calculator right now and see for yourself. Don't have a PBX? Consider our Hosted Horizon phone.
See for yourself the savings that can be made when migrating over from legacy ISDN to SIP trunks...
It's a simple 'ready reckoner' where we factored in the current market prices for both ISDN and SIP; you just have to input your current ISDN capacity and we'll calculate the potential savings with SIP… and if like the result, let us know - we’d be happy to provide the detail.
Compared to ISDN our SIP trunking service is less costly per channel and more flexible in how and where geographic telephone numbers can be used. It’s also quicker to install and provision and, as standard, it delivers extremely robust business continuity.
The service can support connections ranging from two channels for small PBX-equipped businesses to an unlimited number of channels for large enterprises and contact centres..
Through a clever yet simple integration, Gamma SIP Trunks can extend unified communications beyond the office environment by connecting Lync™ to the public network. Combining the functionality of Microsoft® Lync™ with the cost-savings and business-grade resilience of Gamma SIP trunking solutions offers you and your customers lots of benefits.
SIP trunking is now a mature service enjoyed by thousands of UK organisations and this alone is testimony to the reliability of SIP. For added reassurance while your customers switch to us, they can even be used with existing ISDN connections to ensure the transition goes smoothly.
Owning our own national network means we can identify and fix issues faster, through our advanced monitoring and diagnostic tools. It's a combination which has helped us win many major UK fixed line network awards in recent years and one of the reasons more and more businesses are specifying Gamma SIP Trunks.
Our free fraud protection service limits exposure for both you and your customers, to fraudulent activity from endpoints that have fallen victim to hacking or excessive unauthorised call spends.
This free fraud protection service gives you:
From the moment we connect their SIP trunking service, your customer will enjoy all the reliability, resilience and quality that comes from being on the UK's fourth largest network. We proactively monitor and manage quality of service across our entire network - it’s the underlying network quality that makes a real difference to SIP trunking. And as a consequence we are able to support both G.729 or G.711 codecs.
Quality is assured through :
We’re a Janet-connected partner with a direct, geographically diverse interconnect to provide voice services in the form of Gamma SIP Trunks to the Janet community. Janet is the network dedicated to the needs of research and education in the UK, connecting the UK’s research and education institutions to each other, as well as to the rest of the world.
Here are just some of the current business issues we encounter with our customers where we can really help.
If your customer’s office has to be temporarily relocated in an emergency, this can quickly and cost-effectively be achieved with Gamma SIP Trunks. Providing your customers with the additional business continuity benefits that come as standard with our SIP service helps to create stickier relationships and increase retention.
For businesses with multiple sites, SIP trunking provides ISDN line rationalisation options and reduces the number of PBXs that require maintaining - all with full control over the numbers associated with your customer’s business.
Gamma SIP Trunks are valuable for businesses with seasonal voice capacity requirements where more lines need to be quickly and easily implemented with no long-term commitments, for example when running sales campaigns or during major sports or entertainment events.
Unlike ISDN, SIP trunks are a highly cost-effective system that can be scaled up and down according to the requirement enabling more effective use of IT team resources by making the provisioning of new users with voice and data systems quick and easy.
The perfect solution for businesses that are starting up, growing or in fixed-term leases; our SIP trunks enable seamless routing of geographic and non-geographic numbers, to any location. This allows your customers to move office and keep their same geographic number without incurring any ongoing call-forwarding costs or costs associated with producing new company stationery, adverts or directory listings.
With Gamma SIP Trunks delivered over Gamma Broadband or Gamma Ethernet, you can have a high-quality voice and data service all over one connection, giving you significant cost savings.