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Microsoft Teams Phone

Choose how you enable PSTN calling with Operator Connect, Direct Routing or Horizon for Teams. Our flexible Direct Routing options can be managed, unmanaged or customised. Whatever your needs, we have a solution to suit your business.

Man on a telephone

What makes Gamma the right choice for Microsoft Teams?

With over 20 years’ experience in delivering cloud-first communications services and a Microsoft Solutions Partner for Modern Work with Advanced specialisation in Calling for Microsoft Teams, Gamma are experts in enabling voice for Microsoft Teams Phone.

  • Cloud first communications heritage

    We have a reputation built on technical expertise and voice service delivery. We’re the UK’s No.1 SIP provider, with 1 in 3 UK businesses relying on us to power their cloud voice services.

  • In depth Microsoft Teams expertise

    Gamma’s voice services can be fully integrated into Microsoft Teams with full PSTN breakout. Gamma has triplicate entry points into Microsoft Azure providing high levels of resilience and availability.

  • 18+ years powering voice solutions for Microsoft

    Gamma has earned advanced specialisation in Calling for Microsoft Teams. This certification recognises Microsoft partners with deep knowledge, extensive experience and proven customer success.

  • We are a business-only provider

    We’re known throughout the industry as being ‘easy to do business with’. We have full management support, from simple provisioning to our UK-based support teams available 24x7x365. We provide industry-leading SLAs.

  • We have full network ownership

    We have full control and flexibility over our services and we own and operate our own network infrastructure, which means that we can build a bespoke solution to meet your exact business requirements.

  • We are highly accredited, secure and reliable

    We hold a variety of independently audited certifications, demonstrating our commitment to driving the highest quality of standards for our products, systems and underlying infrastructure.

Streamline calling with Operator Connect

Operator Connect

We understand the need for integrated solutions to support your business communications, with Microsoft Teams increasingly becoming a key component of the unified communications landscape.

This is why Gamma is part of Operator Connect, a new operator-managed service from Microsoft designed to enable best-in-class seamless and integrated PSTN calling to your Microsoft Teams environment.

Carrier grade calling capabilities

Enable seamless and integrated Carrier-grade calling capabilities for Microsoft Teams with Operator Connect. Operator Connect is a Microsoft run program available to an exclusive group of approved operator partners. Operator Connect has a superior interconnection between Microsoft’s network and the operators via Microsoft Azure Peering Services (MAPS), plus a joint support and engineering model working closely together.

Simplify complexity

Adopt success

Give Teams a voice

Ease of deployment and management

Enable seamless and integrated Carrier-grade calling capabilities for Microsoft Teams with Operator Connect. Operator Connect is a Microsoft run program available to an exclusive group of approved operator partners. Operator Connect has a superior interconnection between Microsoft’s network and the operators via Microsoft Azure Peering Services (MAPS), plus a joint support and engineering model working closely together.

Enhanced calling experience

Full PBX capabilities

Choice & support

Why choose Gamma for Operator Connect

Microsoft Teams expertise

With 15 years' experience enabling voice solutions for Microsoft, we understand business requirements and can help you get the most out of your Microsoft Teams environment.

Continuity of service provider and numbers

  • Maintain your Gamma contracts and relationship, while providing users with a modern calling experience in Microsoft Teams.
  • Maintain your voice services with Gamma and avoid number porting.

Independently-owned, carbon neutral network

  • We own and operate our own carbon neutral network, supporting over six million business users in the UK.
  • Full control of the network enables us to deliver services more efficiently while offering high levels of automation and a governance structure.

Augmented service

  • Native fraud management capability to protect against toll fraud.
  • Enhanced Teams Calling capabilities and Carrier-grade, cloud-based resilience through Gamma's SIP Trunk Call Manager.

Cloud communications heritage

  • 20 years' experience in delivering cloud-first communication services.
  • UK's No.1 SIP provider.
  • Accredited provider across a number of public sector purchasing frameworks.

Microsoft expertise

  • Deep integration with Microsoft, including networking, provisioning, management, reporting API's and Teams portal integration, providing a simple and reliable way to enable calling.
  • Gold Microsoft Partner for Messaging, Communications, Collaboration and Content, cloud productivity + Windows and Devices.

Gamma Direct Routing

Enable full voice capability natively into Microsoft Teams, as an alternative to Microsoft Calling Plan and without the need for on-premise hardware. Teams – Direct Routing from Gamma utilises Microsoft certified Session Border Controllers (SBCs) to deliver better value, greater flexibility, increased functionality and support for migration, all as a cloud-based service.

Maximise value from your Teams environment

Providing connectivity to Microsoft Teams

Direct Routing provides connectivity to your Microsoft Teams’ tenant enabling full PSTN breakout on the public telephone network. Connection from Microsoft Teams to our network is via an IP connection (for example Gamma Broadband or Ethernet) and is delivered as an end-to-end service with high availability.

Simple voice integration with Microsoft Teams

High availability architecture

Easy to do business with

Benefits of Gamma Direct Routing

Reduce complex management

Direct Routing for Microsoft Teams simplifies phone system administration for your businesses by integrating with Microsoft teams for managing call routing, voicemail, call queues, and other phone system settings. This allows you to easily make changes and updates to your organisations phone system.

Save budget

Streamline communications channels

Scale up, scale down

Get the most out of Microsoft Teams with Gamma.

Transform the way you communicate on Microsoft Teams with the UK’s #1 SIP provider. We can help your business deploy secure, effective voice and video collaboration for your Microsoft Teams environment. Choose how you enable calling with Operator Connect or Direct Routing or our managed service for enterprises.

Delivering a better experience

Excellent customer service

We are committed to excellence in customer service and support, not only will you benefit from dedicated account management, but we also have UK-based support teams offering 24×7 first line support.

Pedigree with Microsoft

Full PSTN Breakout

Built in resilience

Lady looking at laptop while on phone
Give Teams a voice

Ease of deployment and management

We understand that implementing a new solution can be daunting. With Gamma, you get the highest level of enablement and support depending on your requirements. With global reach, our Microsoft Teams solutions have been designed with scalable capacity, allowing your business to grow without restriction.

Enhanced calling experience

Full PBX capabilities

Choice & support

Smiling lady on a video call on a laptop
We're good together
“Gamma helped us every step of the way to migrate our critical services to Teams.”

How does our Teams managed service compare with other providers?

Other Teams Voice Providers

Commodity

  • SIP and SBC Support
  • Portal based support
  • Phone support
  • 24×7 support
  • DR Adds, Moves and Changes
  • Regular Service Reviews
  • Dedicated Account Manager

Enablement & Support

  • Managed onboarding
  • User Migration
  • Training and Adoption services
  • Cloud based Training Portal
  • Dedicated Customer Success Manager
  • Microsoft Teams support
  • Teams – Adds, Moves and Changes
  • Guided Success Delivery Framework
  • Number Porting Assurance Service
  • Packaged services / Transition services
  • Integrated into Teams Admin Center

Microsoft Partnership

  • Partnered with Microsoft to provide shared SLAs for support, availability and call quality
  • Calling for Microsoft Teams Advanced Specialisation

Gamma

Commodity

  • SIP and SBC Support
  • Portal based support
  • Phone support
  • 24×7 support
  • DR Adds, Moves and Changes
  • Regular Service Reviews
  • Dedicated Account Manager

Enablement & Support

  • Managed onboarding
  • User Migration
  • Training and Adoption services
  • Cloud based Training Portal
  • Dedicated Customer Success Manager
  • Microsoft Teams support
  • Teams – Adds, Moves and Changes
  • Guided Success Delivery Framework
  • Number Porting Assurance Service
  • Packaged services / Transition services
  • Integrated into Teams Admin Center

Microsoft Partnership

  • Partnered with Microsoft to provide shared SLAs for support, availability and call quality
  • Calling for Microsoft Teams Advanced Specialisation

Commodity

SIP and SBC Support
Portal based support
Phone support
24×7 support
DR Adds, Moves and Changes
Regular Service Reviews
Dedicated Account Manager

Enablement & Support

Managed onboarding
User Migration
Training and Adoption services
Cloud based Training Portal
Dedicated Customer Success Manager
Microsoft Teams support
Teams – Adds, Moves and Changes
Guided Success Delivery Framework
Number Porting Assurance Service
Packaged services / Transition services
Integrated into Teams Admin Center

Microsoft Partnership

Partnered with Microsoft to provide shared SLAs for support, availability and call quality
Calling for Microsoft Teams Advanced Specialisation

Frequently Asked Questions about Microsoft Teams Phone

Why would I go to Gamma and not just buy direct from Microsoft?

Could Teams really replace a PBX?

What do I do if Microsoft Teams Phone from Gamma has an outage?

What is the difference between Direct Routing and Operator Connect?

What is required to enable Direct Routing?

What is required to enable Direct Routing?

Do I need an internet service from Gamma to qualify for Direct Routing?

What is required for Operator Connect?

What is Operator Connect Conferencing?

How does Direct Routing for Microsoft Teams handle emergency calls?

What is hosted telephony?

I need MiFID II compliant call recording

Do I need an internet service from Gamma to qualify for Microsoft Teams Phone?

Do I need PowerShell experience to provision Users?

What is Operator Connect?

What is Direct Routing?

Watch
Read
Listen

Insight from Gamma, and leading figures from the evolving world of business communications

Podcast

Microsoft Teams Updates - The Gammabox Podcast

Interview

UCaaS & CCaaS for better CX

Webcast

Giving teams a voice