A SIP (Session Initiation Protocol) trunk is a virtual version of an analogue phone line and supports limitless channels to your PBX, allowing you to make local, long distance and international calls over the internet.
Elite’s SIP Trunking service delivers true business communication to support your IP telephony system. Whether you are new to SIP trunking or have experience with the service, our trained business support teams can help you throughout your journey.
We know you need to keep track of costs, so we have built great value call bundles to ensure you know how much you will spend each month, while bespoke solutions, dedicated account management, 24/7 UK support and enterprise-class SLAs come as standard.
Let’s work together to future-proof your communications with top-class SIP trunk solutions with unbeatable support from Elite.
Equip Your business with a scalable, resilient, internet-based telephony service that prepares your business for the digital age.
As calls are carried over the internet (with the ability to divert to the PSTN), SIP trunking provides cheaper national and international calls.
For businesses with multiple locations, our SIP trunk services not only provide you with the opportunity to review your existing telephony, but allow you to reduce the number of high-maintenance IP PBXs.
Add and remove channels/numbers easily with Elite’s call management system. Geographically independent and limitlessly scalable, SIP trunking supports fast growth businesses.
Connecting new geographic locations with a new simple setup enables you to get your new SIP trunk operating at full capacity, quickly.
Combine voice, fax and data into a single, combined solution and make your communications portfolio easier to manage, operate and upgrade.
As part of our aim to be a sustainable company, we are committed to partnering with brands whose business practices align with this aim. Gamma is a fully certified Carbon Neutral company who purchase 100% renewable energy to power its business in the UK. They continuously measure their carbon footprint and reduce their emissions through investment in a variety of green initiatives. Voiceflex have reduced their CO2 emissions by at least 10% and have received gold recognition from business sustainability rating provider, EcoVadis. Partnering with Gamma and Voiceflex contributes to our ability to operate in a more sustainable way.
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“When we looked at our existing suppliers, side-by-side, Elite Group stood out as the provider who looked after our needs the best. Elite Group were always available to speak with when we contacted them, ready to offer advice, and we had access to a dedicated account manager who ensured our needs were always being met. It made sense that we would look to shift all communications to them.”
Want to learn more about how SIP Trunks can change your business for the better? Elite Group is here for you. Fill out your details and a member of the team will be back in touch with you shortly.
SIP Endpoints support connections ranging from two channels for small PBX-equipped businesses to an unlimited number of channels for large enterprises and contact centres. You can also add or remove additional lines at any time.
SIP trunking 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. ISDN is also being decommissioned and will be end of life in the UK, as part of the PSTN shutdown project by January 2027.
SIP trunking has moved from being a “trusted alternative” to the definitive standard for UK business communications. With the nationwide switch-off of the PSTN and ISDN networks now nearly complete, SIP trunks (alongside hosted VoIP) have become the primary migration path for hundreds of thousands of organisations across the country.
From the moment we connect your SIP trunking service, you will enjoy all the reliability, resilience and quality that comes from working with the UK’s leading SIP carriers. We proactively monitor and manage Quality of Service across the entire network as it’s this that makes the real different to SIP trunk call quality.
SIP trunks can handle emergencies easily. They are inherently disaster/recovery/business continuity ready, allowing you to re-route calls to an alternative location quickly and easily.
Number flexibility with Business SIP trunks you can keep your existing number, even when moving out of the area. This saves you costs on printed company literature and stationery, while maintaining the perception that you still have a presence in the area you have moved from.
Microsoft Teams is the go-to tool for countless businesses seeking streamlined internal comms, but it needs a “bridge” to connect to actual phones, so you can call mobiles and landlines. Direct Routing is that bridge. It uses SIP Trunking to link your Teams app directly to the global telephone network, consolidating your communications while also saving you money compared to some of Microsoft’s own preset calling plans.
To make SIP Trunking work effectively, you need the most stable and reliable internet connectivity possible. While each active call only requires about 100 Kbps of bandwidth, that connection must be consistent and prioritised over other web traffic using Quality of Service (QoS) settings to prevent audio “jitter” or dropped calls. For the best results in 2026, a business-grade Leased Line or Dedicated Internet Access (DIA) is recommended – we can help with this. Speak with an Elite Group expert today.
Absolutely – you can do this through number porting. This is the digital transfer of your existing business numbers from a legacy provider to your new IP-based platform. Once you provide a Letter of Authority (LOA), your new provider coordinates a “port date” with your current carrier (usually within 7 to 14 days). On that scheduled day, call routing shifts from the old copper network to your SIP connection with minimal downtime, ensuring your customers can still reach you on the same familiar numbers without any interruption to your operations.
Ideally, as soon as possible. When the PSTN switch-off arrives in January 2027, you’ll lose connection to your customers instantly if your phones are still reliant on the old lines. By moving to SIP Trunks sooner rather than later, you’re not only preparing for the inevitable, but you’re also beating the last-minute rush when countless businesses will be scrambling to onboard such services.
