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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
As one of the bigger Microsoft Teams Operator Connect partners, Orange offers a lot. The solution comes with emergency calling and local voice services in 25 countries. Plus, Orange can assist organizations with installation, migration, and administrative management. There’s even the option to combine Orange’s Operator Connect solution with service and management tools for Microsoft Teams Rooms.
Behind the scenes, Orange wraps it all with centralized billing, carrier-class SLAs, and 24/7 support that enterprises expect.
Rogers Business
Delivering a wide range of small business and corporate mobile plans, business hubs, and internet services, Rogers Business is one of the most popular Microsoft Teams Operator Connect partners. The company offers Operator Connect solutions, for Canada-wide calls inside and outside of the Microsoft Teams environment, with end-to-end simplicity.
Alongside Operator Connect, Roger Business also delivers a dedicated Teams Phone Mobile service, which includes all of the benefits of Operator Connect, with solutions for flexible and agile companies. The Mobile offering even allows companies to leverage call recording and retention on mobile devices, and make calls via a cellular network or internet connection.
Then there’s the resiliency piece. Rogers leans on its national-grade network plus deep peering with Azure, which means better call quality and fewer disappearances mid-meeting.
Swisscom
Swisscom takes a quietly thoughtful approach to Operator Connect for Microsoft Teams. In Switzerland, they’ve bundled fixed-line and mobile calling into a simple extension of Teams. It’s fixphone and mobile wrapped into one platform.
What stands out are the options. They’re pushing mobile with solutions like Teams Telephony Mobile, where users can pick up a Teams call on their own device using the native dialer. The service is fully managed by Swisscom, and comes with a comprehensive service level agreement, backed by Microsoft.
Plus, Swisscom also offers companies a range of other Microsoft 365 services to explore, from customizable cloud solutions to Microsoft 365 management services. There’s even an intelligent solution for Microsoft 365 Copilot.
Tata Communications
Tata Communications arrives at Operator Connect with a scope that commands attention. Their GlobalRapide platform, not just PSTN voice, but calling, conferencing, and full lifecycle orchestration, is live across 60+ countries. It’s everything-from-hi-rise to hybrid ready.
They were early movers too. Tata was a global launch-partner for Operator Connect and even earned “Preferred” status from Microsoft. Companies can take advantage of on-demand automated service provisioning, as well as free trials of the Operator Connect experience.
Tata Communications also offers various plans to choose from, from a comprehensive Managed plan, to the base Connect plan, and a custom tailored plan. End-to-end support is included with all plan options.
Telenor
If your teams are spread across the Nordics, Telenor is one of more notable Microsoft Teams Operator Connect partners. Their solution is designed to cover everything from agile startups in Oslo to sprawling enterprises in Stockholm. The company offers an all-in-one communication interface for business users, as well as mobile backup options.
Set-up is unexpectedly effortless. Provisioning a number? Just a few clicks in your Teams admin centre. Telenor builds the rest behind the scenes on a resilient, Azure-peered infrastructure with built-in QoS and service-level guarantees.
Companies can also leverage a range of additional services from Telenor, such as digital security applications, and mobile company internet connectivity.
Telia
Telia knows hybrid work better than most, and has baked that insight into its Operator Connect offering. Mid-sized firms to large-scale operations can flip on calling in Teams, integrate mobile services via Teams Phone Mobile, and keep their fixed lines in the mix, all under one cohesive umbrella.
Telia peering directly with Microsoft’s cloud ensures flush quality on calls, while still giving IT a single pane of glass for management. Telia promises an easy administrative experience, and carrier-grade voice quality for all conversations.
Plus, Telia works with Microsoft to offer end-to-end support with migration, setup, and technology management. With flexible solutions to suit a range of businesses, Telia is constantly updating its ecosystem to support companies around the world.
Verizon Business
One of the better-known Microsoft Teams Operator Connect partners in the US, Verizon Business has a long-standing relationship with Microsoft. The Operator Connect solution offered by the organization takes advantage of Verizon’s award-winning SIP trunking service, and Microsoft’s convenient administrative interface.
They lean into three services: Direct Routing, Operator Connect, and Teams Phone Mobile. That means flexibility to choose whatever fits your users best. Set-up is easy, thanks to deep peering with Azure and a full Teams admin integration.
Plus, Verizon also offers solutions like Verizon VoIP for Operator Connect, and Verizon Calling in Teams. This ensures companies can access any communication strategy they need within the Microsoft landscape.
Virgin Media Business
Virgin Media O2 Business peeled back the curtain on Operator Connect for Microsoft Teams with a promise that organizations could modernize voice in minutes. Every business gets a system they can plug into Teams via their Teams Calling Automation Platform (TCAP), and numbers appear instantly.
Sitting on top of that? Their newly launched Teams Phone Mobile, which gives users a single identity whether they’re calling from Teams, their mobile, or the desk. Users get continuity, admins get tidy billing and compliance, and everyone gets the benefit of infrastructure built for the cloud.
Constant support from a team of in-house experts is available for all deployments, and companies can even leverage tools to help them optimize their bandwidth usage.
The Best Microsoft Teams Operator Connect Partners
When you look across the current landscape of Microsoft Teams Operator Connect partners, it’s clear there’s plenty of choice. Each provider brings its own strengths to the table, whether that’s international reach, strong local networks, or mobile-first calling plans.
For IT teams, that flexibility is valuable. It means you can match the service to your footprint and user needs, instead of bending your strategy to fit what a carrier happens to offer.
The decision isn’t just about cost or coverage. It’s also about how much control you want in the Teams admin center, how simple you need the rollout to be, and how important resilience and compliance are in your market.
At UC Today, our job is to make sense of this shifting market and give you the resources to move forward with confidence. Here’s how we can help:
- Research at your fingertips: Our research reports break down the trends driving Operator Connect adoption and compare vendor performance in detail.
- A community to learn from: Connect with IT leaders and decision-makers already running Operator Connect in the UC Community.
- See the tech in action: Check our events calendar for upcoming opportunities to meet providers, watch live demos, and talk to peers.
- A roadmap for buyers: Our UC Buyer’s Guide walks through every stage of selecting and implementing the right communications platform.
The right Operator Connect partner won’t just handle your calls. Done well, it can simplify IT, improve resilience, and give employees a consistent experience wherever they work.
