Discover how Global Session Initiation Protocol (SIP) brings your infrastructure together to use your data network to make calls – accelerating digital transformation.
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.
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Why choose BT for voice networks
Reduce costs and get more features and flexibility, with our range of voice network solutions.
Industry leader
We support businesses across the UK and overseas, hosting over five million users and carrying ten billion minutes annually.
Reliable service
We monitor voice quality and reliability – our tools let you track your SIP usage and service behaviour to detect any anomalies.
Feel supported
We’re a leader in voice technology in the UK. We work with growing companies to support their voice calling needs, and we’ll support you.
Voice over Internet Protocol, or VoIP, uses the internet to make and receive calls. It's a great way for small and medium-sized businesses to better manage their communications. Enjoy lower call and infrastructure costs, access new features and enjoy better security.
