Microsoft Teams Integration
Make real calls without leaving Teams
🟦 Microsoft Teams Integration connects your Cloud PBX phone system to Microsoft Teams, the collaboration platform your team already uses for chat, meetings, and file sharing. With this integration, employees make and receive real business calls directly inside Teams, using your existing company phone numbers.
💡 Teams is not a phone system on its own. Microsoft Teams handles chat, video meetings, and file collaboration. It does not manage phone lines, local numbers, or the public telephone network. A Cloud PBX provides that layer, and the integration links the two so your team works in one place.
How It Works
💡 In short: Teams becomes the phone interface, while a Cloud PBX handles the numbers, routing, and connection to the public network behind the scenes.
🟦 What Teams integration unlocks: one app for calls, chat, and meetings; business numbers on every device; call routing and queues preserved; remote staff reachable on the office number.
The Three Ways to Add Calling to Teams
Microsoft Teams handles chat, meetings, and file sharing, but not phone calls on its own. To make and receive real calls from Teams, three paths exist. They differ less in what users experience, and more in control, flexibility, and total cost over time.
🏆 Direct Routing
Most flexible and cost-controlled. A certified telecom operator connects Teams to the public network via a Session Border Controller. When delivered as a managed service, setup takes minutes and the operator handles all infrastructure.
Best for: any business that wants choice of carrier, predictable cost, and room to grow across countries or integrate with an existing PBX.
⚙️ Operator Connect
Admin inside Teams. A certified operator provisions numbers you assign inside the Teams admin centre. Convenient for number assignment but adds an aggregation layer between you and the operator.
Best for: organisations fully invested in Microsoft admin tools where the extra cost of aggregation is acceptable.
🧭 What to weigh up: all three paths let users call from Teams using real phone numbers. Differences show up in pricing flexibility, ability to integrate with existing systems, operator choice across countries, and how much control your IT team retains. Operator Connect is often presented as simpler, but a managed Direct Routing service offers similar ease with fewer commercial constraints and broader flexibility for growing or international setups.
🇱🇺 Luxembourg reality: Operator Connect and Direct Routing are both available from certified local providers. Microsoft Calling Plans have limited coverage in LU. Direct Routing delivered as a managed service is a common choice for LU, BE, DE, and FR setups because it supports cross-border numbers and multi-carrier strategies without extra aggregation fees.
Why It Matters for Your Business
What to Look For
Frequently Asked Questions
❓ Do I need to replace Teams if I add a Cloud PBX?
No. The integration is designed to work alongside Teams, not replace it. Your team continues to use Teams for chat, meetings, and file sharing. The Cloud PBX adds real calling capability on top of what Teams already does. Users see a single app; the phone layer runs in the background through the PBX connection.
❓ Can I keep my existing phone numbers?
In most cases, yes. Number portability allows you to move existing business numbers to a new provider, including when connecting them to Teams via Direct Routing or Operator Connect. Your Cloud PBX provider can confirm whether your specific numbers are portable, how long the process takes, and any one-off porting fees involved.
❓ Is Operator Connect cheaper than Direct Routing?
Not usually. Both models require the same Microsoft 365 and Teams Phone licences, plus separate billing from a telecom operator. Operator Connect often relies on aggregation platforms between the operator and Microsoft, and those layers can add cost and latency. For larger or international deployments, Direct Routing delivered as a managed service is frequently the more economical option.
❓ What happens if my internet goes down?
If the internet connection fails, Teams calls will not work. Some Cloud PBX providers offer fallback options, such as routing calls to a mobile number automatically when the primary connection is unavailable. Ask your provider about business continuity and disaster recovery options, particularly if call availability is critical to your operations.
❓ Can remote employees use the same phone number as the office?
Yes. Because the phone number is managed by the Cloud PBX, not by a physical device or location, any employee signed in to Teams on any device can be assigned that number. A remote worker in Germany can share an incoming call queue with colleagues in the Luxembourg office and appear to customers as a single team.
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