Voip systems for business

Bring your team and customers closer together and explore our easy to use Voice over Internet Protocol (VoIP) phone systems. As the modern digital alternative to traditional phone lines, discover how VoIP gives you clearer, more flexible calling.

Find your VoIP solution

Enjoy flexible, high‑quality and cost‑effective voice calling, with expert support to make switching simple.

  • Digital Voice for Business

    Move to modern cloud calling with quick setup and reliable everyday performance. A secure, flexible way for growing teams to make and receive calls, with optional collaboration tools when you need them.

  • Cloud Voice

    A flexible hosted phone system for established teams, with dependable cloud calling and built‑in Webex meetings. Easy to manage and designed to grow with your business.

  • Cloud Work

    A full unified communications platform that brings calling, messaging, meetings and integrations together. Ideal for hybrid teams who need advanced features and seamless collaboration from any device.

Total products listed 3. Total products hidden 2.

Discover the benefits of VoIP

Work the way you want

VoIP systems upgrade your small business communications and empower hybrid teams to make and receive calls on any device, wherever they are.

Increase customer satisfaction

Reduce wait times, offer a more personal experience and never miss another call with VoIP phones.

Cut cost without compromise

Replace expensive legacy hardware with a flexible cloud phone system for feature-rich HD calls that look and sound amazing.

Get ready for the digital switchover

The UK’s PSTN network will switch off by 2027. Get ahead of the competition with VoIP phone systems that will boost your business both now and in the future.

Fast, internet-based communication

Discover how the internet is powering high quality voice, video and messaging tools. Learn about the benefits for your business and how we can help you migrate smoothly.

Learn about IP technology

What do I need to start making VoIP calls?

VoIP lets your teams make and receive calls over the internet, with the flexibility to add lines as you grow. And because your numbers aren’t tied to a local exchange, you can keep them even if you move premises.

VoIP for small and medium businesses

chef at a restaurant talking on the phone

If you’re a small business with up to four users, you’ll need:

  • Standard BT Business broadband
  • A VoIP phone or a phone with a VoIP adapter
  • VoIP software

VoIP for corporates

office workers on conference call

If you’re a larger business, you’ll need:

  • Fast BT Business fibre broadband
  • A VoIP phone system

Compare our VoIP systems

Find the right cloud based phone systems for your business.
Skip To Carousel Navigation Controls
Digital Voice for Business

PERFECT FOR: FLEXIBILITY

A set of collaboration tools that’s easy to scale as your business grows.

Includes

  • Instant set-up with optional free remote set-up
  • Add new licenses and features instantly from My Account
  • Unlimited UK calling
Explore Digital Voice
Cloud Voice

PERFECT FOR: GROWING BUSINESSES

All the features of a traditional phone system with the flexibility of the cloud.

Includes

  • No hardware maintenance
  • Integrated security software. Encrypted calls. 24/7 monitoring.
  • 24/7 support, guidance and advice from our experts.
Explore Cloud Voice
Cloud Work

PERFECT FOR: TEAM WORK

An easy-to-use cloud communications platform for more effective multi-channel collaboration.

Includes

  • All your comms on one platform
  • Easily integrated with your existing apps
  • Switch between devices on active calls
  • Add up to 14 international sites
Explore Cloud Work
Cloud Voice Express

PERFECT FOR: BEGINNERS

A traditional phone line with cloud calling features.

Includes

  • Replaces traditional fixed landline services
  • Mobile app compatibility
  • Multi-number and location support
Explore Cloud Voice Express

Global VoIP solutions

Flexible VoIP services that support global calling, integrate with your existing systems and deliver secure, reliable communication at enterprise scale.

  • Global SIP

    Bring your voice infrastructure together with Global SIP. Benefit from a resilient, scalable VoIP service that lets you use your data network for high‑quality global calling and easily integrate with multiple collaboration platforms.

  • Global Voice for CPaaS

    Add global voice capabilities to your applications with API-driven calling, flexible number management and worldwide coverage. This service delivers compliant, reliable voice services that are easy to deploy and scale.

Why choose BT for VoIP

Reduce costs, improve business agility, and benefit from user adoption support when you partner with us on your digital transformation journey.

Innovation and experience

We’re a leader in voice technology in the UK and globally. We work with companies big and small to cater for any complex voice calling needs.

Industry leader

Named by Gartner as the UK’s leading network service provider, and certified by CESG, ours is a network you can trust.

Global voice network

We support customers in over 180 countries, hosting over five million users and carrying ten billion minutes annually.

24/7 support

Our dedicated 24/7 UK-based helpdesk is on hand to help fix any problems, whenever you need it.

Frequently asked questions

  • VoIP means Voice over Internet Protocol. Also known as Digital Voice, its means your service is provided using your internet connection, instead of copper cables. A VoIP phone system allows you to make and receive calls through the IP telephony network without any limits.

    There are many benefits to using VoIP, including:

    • Lower costs: VoIP calls can be much cheaper than traditional landline calls, especially for international calls.
    • Greater flexibility: VoIP calls can be made from anywhere with an internet connection, so you’re not tied to a specific desk or phone.
    • Additional features: Many VoIP providers offer additional features, such as call forwarding, voicemail, and video calling.

    If you are looking for a more affordable and flexible way to make phone call, VoIP is a great option.

  • A VoIP phone is a phone specially designed for VoIP. VoIP phones are also called digital voice phones, IP phones, cloud-based phones, or internet phones, and they typically have features that make them more suitable for VoIP calling, such as better sound quality and more advanced features.

    For the most seamless set-up BT recommends you use VoIP handsets. 

    However, you can use an adapter with your traditional handset and VoIP service.

    Not all phones can be used as VoIP phones, or internet phones, but many can. In general, any phone that can connect to the internet can be used as a VoIP phone. This includes smartphones, tablets, laptops, and even some desktop computers.

  • When we talk about traditional phone lines, we’re referring to the copper landlines which run overhead or underground to properties.

  • Simple! We’ll do everything for you. Give our team of experts a call and we’ll take care of the rest!

Discover more of our services

Skip To Carousel Navigation Controls
Video conferencing

Video conferencing

Discover tools that enhance teamwork and support secure, flexible working across multiple locations.
Cloud-based phone systems

Cloud-based phone systems

Move to a modern phone system hosted in the cloud, enabling you to make and receive calls from anywhere, on any device.
Microsoft Teams

Microsoft Teams

Explore tools that extend your Teams experience and support secure, seamless communication at scale.