Telecom5G for business: complete implementation guide
12 minMar 12, 2026
B
Next Buildness Team
Business Communication Specialists
The decision between keeping a classic telephone PBX or migrating to a platform like Microsoft Teams Phone is one of the most frequent for SMEs modernizing their communication infrastructure.
Microsoft Teams Phone: advantages and limitations
Teams Phone integrates PSTN calls directly into the Microsoft collaboration platform.
- ✅ Native integration with Office 365
- ✅ No physical hardware
- ✅ Instant scalability
- ❌ Full internet dependency
- ❌ Learning curve
Traditional PBX: where it still makes sense
For companies with call centers, proprietary CRM integrations, or unstable internet, PBX remains the most robust solution.
- ✅ Works without internet
- ✅ Advanced call center features
- ❌ High initial hardware cost
- ❌ Complex maintenance
3-year lifecycle cost analysis
For a 20-user company: physical PBX — €18,000 to €25,000. Teams Phone — €8,000 to €12,000.
Migration to Teams Phone via Vodafone Calling Plan has an average ROI of 14 months for SMEs with 10 to 50 users.
The hybrid solution
Many SMEs opt for a progressive transition: keep the existing PBX as backbone and gradually migrate extensions to Teams Phone.
There is no single answer. Next Buildness performs a free communications diagnosis to identify the right solution for each company.
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