SIP Trunks

Business SIP Trunking


We offer this service to enable your business to operate a selection of telecommunications systems through your company's IP network.


There are two main benefits to enhance the way you stay connected:

  • Save on business calls abroad

  • Cheaper alternative to ISDN30e solutions

  • More minutes for less

  • Guaranteed call quality

  • Retain your existing telephone numbers

  • Perfect for all Disaster Recovery requirement

Our business SIP trunks are a more affordable alternative to ISDN30 line rental and internet services, without compromising on the level of performance.

We also provide managed services to cover IP connectivity and number management, ensuring that we can deliver a complete communications solution.

As an experienced SIP trunk provider, our knowledgeable engineers will be able to help with any questions you might have .

Why choose Wanzo SIP Trunks?


We offer a range of components to connect your system via SIP trunks, taking full responsibility for delivering your service from day one.

We operate an independent core network infrastructure.

We provide telephone numbers from all across the UK, routing them through to any office location.

We ensure compatibility with a host of SIP devices from several different manufacturers.


What are the benefits?

Saves you money

Save more that 30% on monthly telecommunications costs with multi-modal communication capability

More flexible

Simply add or reduce connection capacity as needed, to increase the flexibility of your service

Higher quality

Have clear business conversations and meetings with improved voice and video quality, think audio in HD.

Smarter billing

Take advantage of reduced administration with simplified billing for voice and data services

Trunk aggregation

Use idle connections in one location for calls at another by centralising and eliminating redundant connections

Try for free today

What is SIP trunking?

Session Initiation Protocol is a signaling communications method used by internet telephony service providers to deliver voice and video calls over IP networks. It establishes and closes calls and works alongside other protocols in transporting thousands of data packets (audio and video). Unlike services such as Skype, business SIP trunks provide far superior performance and stability.

Data circuits

Are high-quality calls a necessity for your business? We can advise on and support your network with the right data circuits to avoid disruption. Standard ADSL is inadequate for the delivery of voice data, especially with an overcrowded network.

The right numbers


We know you need to have numbers from the dialing codes you want to be delivered, regardless of location. The ability to centralise numbers from large and complex cities (London, Manchester, Birmingham, Glasgow) to a single hub ensures that you will have a nationwide presence for your business. 

Disaster recovery

Damage can easily be done to the finances and reputation of any business. With SIP, you will have a Disaster Recovery strategy ready to respond (which hopefully you'll never need)! With such high level of resilience available, users will be completely unaware of any issues.

Quality assured


Each IP data packet will arrive in order and without delay to create a steady stream of delivery. You will never have to put up with packet loss, time delays or interruptions. As a proud provider of all IT services, we pride ourselves on the best call quality, ease and value for money to keep your business ahead in telecommunications.

Need more details? Contact us

We are here to assist. Contact us by phone, email or via our Social Media channels.



© 2019 by Wanzo

  • LinkedIn - White Circle
  • Facebook - White Circle
  • Twitter - White Circle
  • Instagram - White Circle


Lansdowne House,

57 Berkeley Square,

Mayfar, London.