Microsoft Teams Phone System UK
Replace Your Business Landline
Turn Microsoft Teams into a fully-fledged Cloud PBX. Keep your existing UK numbers, reduce VoIP costs, and make or receive calls from any device - securely and without legacy PBX hardware.
The UK PSTN & ISDN Switch-Off: Act Now
By the end of 2025 (extending in phases to 2027), BT Openreach is entirely switching off the traditional analogue phone network (PSTN and ISDN). If your UK business still relies on an on-premise PBX or standard phone lines, your telephony service will eventually stop working.
Migrating to a Cloud PBX like Microsoft Teams Phone is the most seamless way to future-proof your communications, lower hardware costs, and unite your workforce.
Unified Communications for UK SMEs
Stop paying for a separate VoIP provider. Bring your external calls directly into the Teams app you already use.
Work from Anywhere
Make and receive business calls on your laptop, mobile, or tablet. Your office number follows you via the Microsoft Teams app.
UK Number Porting
We securely port your existing UK landline numbers (London 020, Manchester 0161, 0800) straight into your new Microsoft SIP trunk.
Cost Efficiency
Eliminate physical PBX maintenance and expensive line rentals. Consolidate your communication billing inside your M365 tenant.
Auto Attendant & IVR
Deploy professional greetings ("Press 1 for Sales, 2 for Support") and Call Queues to route incoming customer calls intelligently.
Device Freedom
Use standard headsets, mobile apps, or certified desk phones (like Yealink/Poly). No proprietary hardware lock-in.
VoIP Call Recording
Easily comply with UK compliance regulations by adding robust call recording and analytics to your Teams environment.
Direct Routing vs Microsoft Calling Plans
Microsoft Calling Plans
Best for very small teams (1-10 users).
- ✓ Simple to buy directly from the Microsoft 365 admin center.
- ✓ Predictable bundle of domestic/international minutes.
- ✕ Very expensive per-user monthly costs.
- ✕ Difficult to integrate complex legacy systems or analogue devices.
Teams Direct Routing (Recommended)
Best for SMEs (10+ users). We connect a UK SIP trunk directly to your tenant.
- ✓ Significantly cheaper call rates and line rentals.
- ✓ Extremely flexible—pay for SIP channels, not expensive user minute bundles.
- ✓ Seamless UK number porting managed by telecom experts.
- ✓ Advanced disaster recovery and routing capabilities.
Confused by Microsoft Licensing?
Whether it's Teams Phone Standard, Operator Connect, or E5 licenses — we make it simple.
You don't need to be an expert. As a Microsoft 365 Management provider, we audit your existing setup and tell you exactly which add-on you need to enable calling. Often, you're already paying for part of it.
Licensing mistakes are one of the most common and costly issues in Cloud PBX migrations. We prevent overspending and configuration errors.
Why Switch? The Comparison
Common Teams Phone Scenarios
Real situations where Microsoft Teams Phone replaces traditional business phone systems for UK SMEs.
Small Office / Professional Services
5–20 Users
A growing business moving offices or downsizing no longer wants desk phones or phone lines tied to a specific location.
Setup: Teams Phone via Direct Routing
Devices: Laptops + standard headsets
Result: Same office number, usable from anywhere.
Sales / Recruitment Teams
20–50 Users
Teams that rely heavily on calls need advanced call queues, voicemail transcriptions, and call recording without a clunky separate system.
Features: Call queues, auto attendants
Optional: Call recording & reporting
Result: Drastically improved call handling.
Remote & Mobile Workforce
Field-based Staff
Engineers, managers or site staff work mostly on mobile and need a single professional business number instead of giving out personal mobiles.
Setup: Teams app on iOS/Android devices
Connectivity: 4G / 5G / Wi-Fi
Result: One company number, no missed calls.
Technologies & Hardware Partners
Frequently Asked Questions
Can I keep my current UK phone numbers?
Yes. We handle the strict "Porting" process for you. Whether you have 020 London numbers, local geographic numbers, or 0333/0800 numbers, they can be migrated to Microsoft Teams seamlessly without service interruption.
What is Direct Routing?
Direct Routing is the process of connecting Microsoft Teams to a traditional telephony network via a third-party SIP trunk provider, rather than buying Microsoft's own expensive Calling Plans. It drastically lowers monthly costs and provides better support. We configure and manage the entire Direct Routing setup.
Do I need to buy new desk phones?
No. One of the biggest advantages of a Cloud PBX is that you can simply use headsets with your computers or the Teams app on your mobile phones (Softphone). However, if your reception or warehouse prefers physical hardware, we can supply Teams-certified desk phones from brands like Yealink or Poly.
What happens if the office internet goes down?
Since Teams Phone is a cloud service, it works across all your devices simultaneously. If the office internet fails, you can simply continue answering calls on your mobile phone's 4G/5G data connection, ensuring unparalleled disaster recovery compared to traditional PBX lines.
What Microsoft licenses are required for Teams Phone?
It depends on your current subscription. Most UK SMEs use Microsoft 365 Business Basic or Premium, which requires the "Teams Phone Standard" add-on. We will audit your current licenses and build the most cost-effective architecture for your firm.
Ready to ditch the landline?
The UK PSTN Switch-Off is fast approaching. Modernise your communications today.
We manage the entire migration process, number porting, and call routing setup. No downtime, just better calling.
Book a VoIP ConsultationPrefer to talk directly? Call an IT engineer: +44 333 880 1344
Microsoft Teams Phone System & VoIP Services in the UK
SmartOps IT helps businesses across the United Kingdom move away from outdated PBX and ISDN systems toward modern cloud-based phone systems powered by Microsoft Teams Phone. We support the full migration process - including Direct Routing, UK number porting, call routing setup, auto-attendants, and Microsoft 365 integration - helping businesses modernise communication without unnecessary disruption or complexity. With the BT ISDN switch-off approaching, securing a reliable Cloud PBX is critical. Combined with our Managed IT support and cybersecurity services , we create secure and flexible communication environments that allow teams to stay connected whether working from the office, remotely, or on the move.