Flexible solution

Our SIP trunking solution offers your business a lower-cost and more flexible solution than ISDN for your outbound and inbound voice calls.

It provides a connection between your PBX and the PSTN using Ethernet, broadband or a private circuit connected to our national network.

Our SIP trunking solution costs less per channel than ISDN and provides more flexibility in how and where you can use geographic telephone numbers. It is also faster to provision and install, and it provides very strong business continuity.

Compatible with all major IP PBX brands

SIP trunking can support two channels for small businesses with a PBX to an unlimited number of channels for contact centres and larger companies.

Our SIP trunks are compatible with all major IP PBX brands utilised in the UK. If you have a PBX, then you can change to using our SIP trunking solution and immediately receive a phone service that is more resilient, more flexible and less expensive.

If you do not have a PBX, then consider using our hosted phone system.

Benefits to using SIP trunking

There are many benefits to using SIP trunking. You will spend less money on line rental and call costs, as SIP trunking provides connectivity that is more reliable and less costly than ISDN using an IP connection.

You can save up to 25% or more on the cost of calls and up to 50% on the cost of line rentals.

SIP trunking is ideal for medium and large businesses that have multiple sites since besides saving money on call costs and line rentals, you will also receive free internet calls within your company and many other outstanding features.

If you plan to upsize, downsize or move and wish to retain your current telephone numbers, then SIP trunking is the perfect solution. During busy times, you can scale up your lines to accommodate demand and then scale back during periods of reduced activity. In addition, you can always remove lines, add or remove lines, or split calls whenever the need arises.

Need help with your SIP Trunking?

Let us help you find what’s right for you.

What we do

We provide landline communications, business mobiles and connectivity solutions for businesses

Mobile

Confused? Let us help you find what’s right for you.

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Fixed Lines

Save money on your line rental and call charges.

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Broadband

Comprehensive connectivity and networking solutions.

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Phone Systems

A wide range of flexible business phone system packages.

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What our clients say

“We’ve dealt with Synergy for almost 8 years now. With Synergy we enjoy competitive pricing but just as importantly for our business, we get a fast and efficient service. Having Synergy manage our Vodafone account has taken so much of the hassle away from having to deal with call centre staff at Vodafone. We get straightforward, common sense advice with Synergy and they now manage all our communications not just the mobiles. Looking forward to 10 years and beyond, great service guys!”

Navin Kabariya, Jaysam Contractors