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Microsoft Teams

📞 Microsoft Teams is a workplace collaboration platform with 300 million monthly active users worldwide. It can be extended with a telephony add-on called Teams Phone. In Luxembourg, calling requires a separate local operator such as Cegecom, DEEP telecom, or Proximus NXT.
Best for: Businesses already fully committed to Microsoft 365
This page compares Microsoft Teams Phone with a dedicated Cloud PBX. It is for business owners and office managers evaluating their phone system options.

At a Glance

Criteria
Winner
Notes
Telephony focus
Teams Phone is an add-on, not a core product
Cost transparency
Teams requires 3 separate cost layers
Microsoft 365 integration
Teams
Native, no configuration needed
Setup complexity
Teams Phone needs Microsoft admin + local operator
PBX management depth
Call routing, queues, analytics are more advanced
Video conferencing
Tie
Both offer video; Teams is stronger here
Luxembourg PSTN availability
Tie
Both available via local operators

Detailed Comparison

🛠 Customer Support and Management
Microsoft Teams Phone is managed through the Microsoft 365 admin center. Telephony configuration is a subset of a much larger administration environment built for IT departments. For businesses without dedicated IT staff, navigating Teams Phone settings can be complex.
With a dedicated Cloud PBX, telephony management is the primary focus. Portals are designed for office managers, not IT administrators. Support is handled by one vendor, not split across Microsoft, your operator, and potentially a systems integrator.
💶 Pricing and Total Cost
Teams Phone requires three cost layers: a Microsoft 365 license (from approximately 6 EUR per user per month), a Teams Phone add-on (approximately 8 to 10 EUR per user per month), and PSTN fees from a local operator such as Cegecom, DEEP, or Proximus NXT.
A dedicated Cloud PBX is typically one monthly invoice covering the phone system and calling. There are no Microsoft licensing dependencies. Total costs can be comparable or lower, and the billing is simpler.
Cost component
Microsoft Teams
pbx.lu / Voxbi
Licenses
M365 + Teams Phone
One plan
PSTN / Calls
Separate operator
Included
Management
Microsoft admin
PBX portal
📍 Luxembourg and Local Operator Setup
Microsoft Calling Plans are not available directly in Luxembourg. To make and receive calls, you must connect Teams to a local PSTN operator. Three options exist: Cegecom via Operator Connect, DEEP telecom via Direct Routing, and Proximus NXT via Teams Voice.
This means your phone setup involves at least two vendors: Microsoft and an operator. If you use Direct Routing, a Session Border Controller (SBC) may also be required, adding further cost and configuration.
A standalone Cloud PBX in Luxembourg includes PSTN connectivity by default. There is no need for a separate operator relationship.
📊 Call Management and Analytics
Teams Phone includes basic call analytics in the Microsoft Teams admin center. You can view call quality reports and basic usage data. Advanced features such as live wallboards, detailed agent reporting, and custom routing logic are limited compared to a purpose-built PBX.
Voxbi offers live call dashboards, detailed analytics per agent and queue, and flexible routing rules. For businesses managing a front desk, call centre, or multi-department operation, this depth matters.
🔗 Microsoft 365 Integration
This is where Teams Phone has a genuine advantage. If your business already uses Microsoft 365 for email, documents, and meetings, adding Teams Phone keeps everything in one environment. Single sign-on, familiar interface, and deep integration with Outlook, SharePoint, and Teams chat are real benefits.
A standalone Cloud PBX does not replace Microsoft 365 and is not designed to. The two can coexist: use Teams for meetings and documents, and a dedicated Cloud PBX for your phone lines and extensions.
🏗 Setup and Onboarding
Setting up Teams Phone requires configuring Microsoft 365 licenses, enabling Teams Phone in the admin center, connecting to a Luxembourg PSTN operator, and assigning numbers. For businesses without IT support, this process typically requires a reseller or integrator.
A Cloud PBX onboarding is focused on telephony only. The scope is narrower and the setup time is generally shorter. Most providers port existing numbers and configure IVR menus as part of the setup process.

Frequently Asked Questions

Do I need Microsoft 365 to use Teams Phone?
Yes. Teams Phone is an add-on to Microsoft 365. You cannot use it without an active Microsoft 365 Business or Enterprise subscription. If you do not already use Microsoft 365, this adds a significant base cost before telephony even begins.
Can I use Microsoft Teams for calls in Luxembourg without a local operator?
No. Microsoft does not offer Calling Plans directly in Luxembourg. You need a local PSTN operator: Cegecom (Operator Connect), DEEP telecom (Direct Routing), or Proximus NXT (Teams Voice). Each has its own contract and pricing.
Can I use both Teams and a Cloud PBX at the same time?
Yes. Many businesses use Microsoft Teams for internal chat, meetings, and documents while running a separate Cloud PBX for their phone lines, extensions, and IVR. The two systems do not conflict. This approach avoids Microsoft dependency for telephony while keeping the collaboration tools your team already knows.
Is Teams Phone suitable for a small business in Luxembourg?
It depends on your situation. If your business already pays for Microsoft 365 Business Premium and has IT support, Teams Phone can be a reasonable choice. If you are a small business with no IT department and no existing Microsoft 365 subscription, the setup complexity and cost layers make a standalone Cloud PBX a simpler and often cheaper option.
What is the difference between Operator Connect and Direct Routing?
Both are methods to connect Microsoft Teams to a local PSTN operator for making and receiving calls. Operator Connect is a managed, simplified method where the operator configures the connection in the Microsoft admin center. Direct Routing uses a Session Border Controller (SBC) to connect Teams to any SIP-capable operator, and requires more technical setup. In Luxembourg, Cegecom uses Operator Connect; DEEP telecom uses Direct Routing.

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