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Global voice solutions

Increase flexibility and reduce costs for your global voice estate by taking advantage of our global voice network.

Why are global voice solutions important?

The impending closure of traditional voice networks like PSTN and ISDN, and the transition to hybrid working is accelerating the adoption of digital voice and collaboration solutions. Today, global businesses need voice solutions that are flexible, efficient and cost-effective, to accommodate the rapidly changing and often unpredictable business environment. By using the data network to make voice and video calls, our digital voice solutions are playing a critical role in accelerating and future-proofing digital workplace deployments for our global customers.


Ensuring your employees and your customers can connect and communicate without interruption or failure is more important than ever. Our portfolio of digital voice solutions takes advantage of our established global network to provide industry-leading, quality voice infrastructure for some of the most demanding and intensive customer scenarios, where business-critical operations require the reliability and quality our services provides.

Moreover, when it comes to global voice infrastructure, having the right monitoring and performance reporting tools means you’ll get the right level of visibility and analytics to understand activity and service behaviours.

Why choose BT for global voice solutions?

It’s not just the service that makes the difference, but who you choose it with. Why choose global voice solutions from BT?

  • Our global coverage - we can provide Global SIP Outbound in 73 countries, and Global SIP Full PSTN replacement in 24 countries and counting (with 9 more countries in our roadmap over the next 18-24 months).
  • Our quality and reliability of service - we provide voice infrastructure to some of the most demanding and intensive customer scenarios, where our reliability and quality of service is critical to their business-critical operations. Our global voice network is built on our own fabric, meaning we provide industry-leading quality, availability, with excellent performance monitoring and analytics capabilities. Moreover, on our global voice network you get the assurance of enhanced incident management and fraud protection.
  • Our experience - we have set up advanced global telephony solutions for over 350 customers, hosting more than 4 million numbers on behalf of our customers, routing more than 320 million minutes per month across our Global SIP platform alone.

Current offers

Get 3 months free for up to 1000 users within a single site when you buy a collaboration solution together with BT’s voice services for a minimum 3-year contract.

Jump-start your voice transformation and expand your global reach with this limited time offer.

This offer applies to the cloud-based calling services on our collaboration platforms, including:

*Terms and conditions: 

  • Covers per user per month costs for that single site for first three months
  • Applicable to maximum of 1000 users
  • Minimum 500 users required
  • Minimum of 36-month contract term
  • Products included in the offer: Microsoft Teams with BT (SKU 4), Zoom Phone (SKU 4), Operator Connect (basic, standard, pro), Webex calling
  • Signed order needs to be placed by 31/12/2022
  • Offer cannot be used in conjunction with any other offer, unless specified otherwise.
  • Standard pricing applies as per product. 
  • BT may withdraw or amend this Offer at any time without notice but this will not affect any orders that a Customer has already signed up to. 

Our global voice solutions

Global inbound voice network

Enhance customer experience and drive efficiency by managing incoming calls more effectively. D...

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Global SIP

Reduce costs and improve business agility by simplifying and centralising your voice infrastruc...

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Add the power of our Global voice network into your chosen collaboration app

Microsoft Teams

Make collaboration easier for your organisation using Microsoft Teams with BT.

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Webex Calling

Discover how your organisation can become more agile and meet the demands of hybrid working usi...

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Zoom Phone

Streamline your business communications with a reliable cloud phone system using Zoom Phone wit...

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Operator Connect for Microsoft Teams

Operator Connect adds calling and audio conferencing directly into Microsoft Teams. What could ...

Learn more