For all the progress collaboration software has made, the phone still matters. A sales pitch doesn’t land if the audio cuts out. A compliance audit fails if call records aren’t in order. Your global workforce won’t stay connected if coverage drops the second someone boards a plane.
That’s why the top Microsoft Teams Operator Connect partners are becoming more popular. Instead of bolting on PSTN services with complex workarounds, enterprises can plug directly into certified telecom providers inside Teams. The model is simple: pick a provider, connect through the Teams admin center, and let the carrier handle the heavy lifting, no PowerShell necessary.
For IT leaders, it means fewer moving parts and faster deployments. For business leaders, it means confidence that Teams calls will connect wherever people work. Here, we’ll introduce the leaders taken from Microsoft’s certified list, and our own Operator Connect directory.
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Top Microsoft Teams Operator Connect Partners
The Leading Microsoft Teams Operator Connect Partners
There are literally dozens of Operator Connect partners now approved by Microsoft. If you’re looking for someone to plug reliable calling capabilities into Teams, you’ll be spoiled for choice. To narrow things down a little for this list, we took a more focused approach.
We’re concentrating on Microsoft Teams Operator Connect providers that offer at least two of the three core services: calling, conferencing, and mobile. Why? Because most enterprises don’t want to stitch together separate providers for different workloads. The best partners here give you more than one piece of the puzzle. They cover enough ground to simplify how you run voice in Teams.
Some are big global names with networks that stretch across continents. Others are regional specialists who know compliance rules inside-out. Together, they give IT buyers a menu of options that balance reach, resilience, and simplicity.
AT&T
AT&T has been in the carrier game long enough to know that enterprises don’t just want more minutes, they want fewer headaches. Their Operator Connect for Microsoft Teams solution brings AT&T’s Cloud Voice right into the Teams admin center, so IT teams can set up and manage numbers without touching extra portals.
What makes AT&T stand out is the way they’ve tied Operator Connect to Teams Phone Mobile. One number works everywhere: on a desk phone, in the Teams app, and even across AT&T’s wireless network. Plus, under the hood, AT&T leans on its global backbone and direct peering into Microsoft Azure. That reduces call hops and helps keep audio sharp, even for roaming users.
They’ve also started weaving in AI features through Microsoft Copilot, like real-time summaries and smart call handling. It’s the kind of polish that shows AT&T isn’t just moving phone lines into Teams, they’re rethinking how mobile and collaboration fit together.
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Bell
Bell has been a cornerstone in Canadian enterprise voice for decades, so it makes sense they were among the first Microsoft Teams Operator Connect partners in the region. Their service essentially drops Bell’s reliable nationwide PSTN connectivity straight into Teams, with no extra hardware or complex integrations required.
For companies with a dispersed Canadian workforce, that reliability is the big selling point. Bell’s Operator Connect setup runs on geo-redundant infrastructure with automatic failover, so calls don’t suddenly vanish when there’s a local issue. IT teams also get full visibility in the Teams admin center, which makes provisioning and troubleshooting a lot less painful.
More recently, Bell has layered in Teams Phone Mobile, giving employees one number that follows them from their desktop to their smartphone. Compliance and billing stay clean, but users just see it as one identity that works wherever they are.
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BT
BT’s approach to Operator Connect for Microsoft Teams is built on simplicity. Their service allows enterprises to light up calling, conferencing, and even mobile integration directly from Teams, without deploying extra infrastructure. For IT admins, that means you can add numbers or adjust capacity in minutes.
As one of the few Microsoft Teams Operator Connect partners offering all three services, BT is already unique. However, they also offer affordable packages, and wrap in extra services like adoption training, proactive monitoring, and round-the-clock support.
BT peers directly into Microsoft’s network, which helps keep voice quality stable and reduces the latency that sometimes plagues international calls. They’ve also put effort into fast number porting, which is a lifesaver during large migrations.
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Deutsche Telekom
Deutsche Telekom is another of the better-known Microsoft Teams Operator Connect partners, offering an experience that’s especially smart if you’re already entrenched in its network ecosystem. For companies in Germany, dialing up PSTN calling within Teams is as simple as importing your number and assigning it inside the Teams admin center.
The vendor works hand-in-hand with Teams to deliver streamlined experiences to businesses through the Microsoft Teams X collection of telephony extensions and solutions. Organizations can port their existing mobile and landline numbers into Teams in minutes, and manage everything from their admin interface.
Plus, Deutsche Telekom offers end-to-end support for business leaders, guiding them through the migration, setup, administration, and security configuration process for Teams. The company also ensures consistent reliability and uptime through its robust communications network.
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Fusion Connect
Fusion Connect specializes in delivering managed services to companies transitioning to the cloud, and producing intuitive solutions for Microsoft Teams. The company’s range of Microsoft-focused services extend from licensing and consulting solutions, to Teams calling and audio conferencing services.
With Operator Connect, Fusion supports both calling and conferencing, backed by Fusion’s comprehensive service guarantees. These guarantees promise 100% availability for UCaaS.
Companies can take advantage of SMS and MMS for Microsoft Teams, global coverage, professional implementation, and even add-on call recording capabilities. There’s also the option to access business continuity services, and a full Teams attendant console.
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NTT
Serving countries worldwide with global IP network solutions, mobile connectivity, Private 5G and more, NTT is among the leading Microsoft Teams Operator Connect partners.
Their offering covers calling, and conferencing across 40 countries, built on a backbone that promising near-perfect uptime and enterprise-grade SLAs. The NTT Extend service offers fast provisioning and deployment, with unique business phone numbers, and both cellular and landline calling.
Plus, NTT offers a range of tools to help companies unlock more value from Microsoft Teams. For instance, there’s an available attendant console, and compliance recording options. They’re pushing AI front and center too. With deep Microsoft partnership, they layer Copilot automation into voice management and service delivery, so you get efficiency baked in.
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NUWAVE
Long-term Microsoft partner, Nuwave, offers a range of solutions to companies looking to extend the value of their Microsoft Teams investment. Alongside flexible direct routing options, the company also supports Operator Connect, giving companies a straightforward way to unlock the value of cloud communications. Companies can even use Nuwave’s Operator Connect solution alongside Direct Routing and calling plan options within the same tenant.
Nuwave isn’t just another partner either, it’s the backstage engineer of the Operator Connect space. With their Accelerator Program, they’ve turned the multistep Operator Connect certification process into something you could complete in a month, not many of them.
They do this with their patent-pending iPILOT and SYNTHESIS platforms, tools built by carriers for carriers to automate peering to Microsoft’s MAPS network, provisioning, and number management.
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Odido Business
Odido stepped onto the Operator Connect stage by tackling two big headaches at once: fixed telephony dialing and mobile integration. They’ve become the first provider in the Netherlands to offer Teams Phone Mobile, linking mobile numbers directly to Teams so users can call from their Teams app, or simply field calls on their phones with identical identity and context.
Going deeper, they’ve also integrated with CallTo365 to turn Teams into a full-blown telephony exchange. Combine that with Odido’s deep network expertise, and you’ve got a solution that unifies fixed, mobile, and Teams telephony behind one intelligent roof.
For businesses in the Netherlands and beyond who want mobile identity, seamless switching between devices, and single-platform management, Odido makes the telephony landscape feel that much more connected.
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Orange Business
Supporting organizations in over 220 countries and territories worldwide, Orange Business delivers solutions ranging from business VPN and mobility tools, to SD-WAN implementation. For Microsoft Teams customers, Orange Business Services offers both direct routing and Operator Connect solutions, tailored to the needs of different organizations.
