IP Voice

Do more with your phone connection


Futureproof your phone system, reduce costs and improve the quality of your voice calls with IP Voice from Sure.

Our IP Voice solution is perfect for businesses that want advanced features and flexibility from their phone system while reducing costs. 

We provide two types of IP Voice technology. Cloud Voice uses the internet to make calls, while SIP utilises the existing data network at your premises. If you’re not sure which technology is right for your business, our expert team is here to help.

Switching is easy – we do all the work for you. And because we’re based on island, you’ll have peace of mind that help is never far away.


Streamline your phone network and reduce costs.


IP Voice technology grows with your business.


Futureproof your network and be ready for ISDN switch-off.

Cloud Voice - In the cloud

Move your phone systems to the cloud to increase efficiency and reduce costs.

  • Answer your office calls from anywhere
  • Perfect for small and medium-sized businesses
  • No installation or new phone line required
  • Easy to maintain because we do it for you

Download factsheet  

SIP - On your premises*

Utilise your existing phone equipment to make calls over a data
connection. *Please note, this is currently only available in Guernsey and the Isle of Man.

  • Ideal for medium to large businesses, single or multiple premises
  • Multiple simultaneous calls over a single connection
  • Great call quality


Download factsheet

Which VoIP service is best for you?

The answer to this question depends on the size and nature of your business. Neither technology is better than the other. We're here to help you make the right choice.

Cloud Voice

Cloud Voice

In the cloud



On your premises

Small to medium-sized businesses


Ideal for

Medium to large-sized businesses


Reduce call costs


Use it wherever you have an internet connection


Encourages flexible working

Can be used as part of a Unified Comms strategy


Scaleswith yourbusiness

Clock Tick

Future-proofs your phone network




Software updates

Requires manual maintenance


Combines voice & data network


Keep your existing numbers


*not currently available in Jersey

Cloud Voice FAQ

Is there any downtime for my business while the switch happens?

Cloud Voice is easy to install and transition your voice capability to the cloud.

You may require some network setting changes, but Sure has a team of consultants and engineers who will work with you to transition your service.

Either way, we will work with you to ensure that if any disruption to your service could occur that it is coordinated with you and managed appropriately.

Are Cloud voice technologies less secure than using a traditional line?

Our Cloud Voice solution is hosted securely in the cloud. All data is encrypted and two factor authentication is standard.

Do I need to invest in new phones to benefit?

If you choose a cloud-hosted solution your mobile and any computer or laptop you have will work fine, all you need to do is download an app. Your desktop handsets may be compatible (we can advise you) or if not, we have a full range of handsets available.

We would conduct a site survey and give you an accurate proposal based on your situation so you have total peace of mind.

Do I need to change my telephone number?

In the Isle of Man and Guernsey, no, you can use your existing numbers. In Jersey unfortunately the situation is slightly more complicated so please contact us to discuss your options.

Do I have enough bandwidth to use Cloud Voice?

You’ll be adding voice traffic to your current data traffic so it’s possible you might need to upgrade your bandwidth for the best performance. We can help you evaluate this and as we are a leading provider of connectivity, take care of that for you.

Customer Stories

IOM copiers testimonial

IOM Copiers' Resilient Cloud Voice Solution

IOM Copiers telephony system was becoming end of life. They wanted an IP based voice service that would bring together their fixed and mobile estate, along with increased flexibility and reliability. After meeting Sure’s Professional Services team, they chose our Cloud Voice solution.