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Microsoft Teams Calling That Replaces Your Phone System for Good
Turn Teams — the app your team already lives in — into your business phone system, with proper numbers, call queues and 24/7 support behind it.
One App, Not Three
Chat, meetings and calls all in Microsoft Teams, so your team stops juggling a separate phone system, softphone and headset setup.
Configured Properly, Not Just Switched On
We set up call queues, auto attendants and number porting correctly from day one, so calls actually reach the right person, first time.
Backed by Real Support
24/7 monitoring and a 99% SLA guarantee sit behind your Teams calling setup, so call quality issues get caught and fixed, not ignored.
Microsoft Teams calling built to replace your business phone system
The UK's traditional analogue and ISDN phone lines are being switched off, and most businesses using Microsoft 365 already have Teams running for chat and meetings — which makes Teams calling the natural next step rather than buying a separate VoIP phone system. Microsoft Teams calling adds proper business phone numbers, call queues, auto attendants and voicemail into the same app your team already uses every day, connected to the public phone network through calling plans, Operator Connect or direct routing depending on what suits your business. We handle the setup, number porting and configuration, and back it with 24/7 monitoring and support, so replacing your phone system doesn't mean replacing your reliability. For most SMEs the case is straightforward once it's laid out clearly: fewer supplier contracts to manage, one less piece of hardware to maintain, and a phone system your IT provider can actually see and monitor alongside everything else running on Microsoft 365.
What Microsoft Teams calling actually replaces
Teams calling — officially Teams Phone — turns Microsoft Teams into a full business phone system. Instead of a separate desk phone, PBX and phone line contract, calls are made and received directly within Teams, on desktop, mobile or a compatible desk phone if you still want one. Numbers connect to the public telephone network through one of three routes: Microsoft Calling Plans (Microsoft provides the connectivity directly), Operator Connect (a carrier plugs directly into Teams), or Direct Routing (your own SIP trunk provider connects through a session border controller). Which route makes sense depends on your call volumes, existing contracts and international calling needs, and we advise honestly on which fits your business rather than defaulting to whichever is easiest for us to set up.
Call Queues & Auto Attendants
We configure call queues so incoming calls route to the right team or person, with hold music and position announcements, and auto attendants so callers reach the right department without a human having to route every call manually.
Number Porting Without Disruption
We manage porting your existing business numbers across to Teams calling, timed to avoid downtime, so customers keep dialling the number they already know while your team migrates onto the new setup behind the scenes.
Licensing Done Properly
Teams calling requires the right combination of Microsoft 365 and Teams Phone licensing per user, and getting this wrong is one of the most common causes of unexpected costs or missing features later. We work out exactly which licences each user needs based on how they actually use the phone, not a blanket assumption applied to everyone.
Our recent work
A selection of projects and systems we've delivered for our clients.
Our approach to Teams calling
Advise on the Right Connectivity Route
Calling Plans, Operator Connect or Direct Routing each suit different call volumes and existing contracts. We recommend based on your actual usage, not the easiest option for us to deploy.
Migrate Without Disrupting the Business
Number porting, call queue configuration and user training are planned and staged, so your team moves onto Teams calling without dropped calls or confused customers along the way.
How it works
From first conversation to live calling — our streamlined process keeps things simple.
1
Assessment
We review your current phone system, call volumes, number of users and existing Microsoft 365 setup.
2
Design
We recommend the right connectivity route and design call queues, auto attendants and user licensing.
3
Migrate
We configure Teams calling, port your existing numbers, and test everything before go-live.
4
Support
Your Teams calling setup is backed by 24/7 monitoring and support, with a 99% SLA guarantee behind it.
UK businesses move to Microsoft Teams calling when
Their existing ISDN or analogue phone lines are being switched off and need replacing
They're paying for a separate phone system, a Teams licence and a video conferencing tool that all do overlapping things
Remote and hybrid staff need to make and receive business calls from anywhere without a desk phone
Call routing and auto attendants have never been configured, so calls get missed or misdirected
They're already using Microsoft 365 and want calling built into the same platform rather than a separate app
They're expanding to a second site or opening new lines and want a system that scales without new hardware
Their current phone system provider has poor support and call quality issues go unresolved for weeks
They need call reporting and analytics that their current phone system simply can't provide
They want to keep their existing business numbers but move the underlying system onto something more reliable
Why choose Cloudswitched for Microsoft Teams calling?
We manage Microsoft 365 environments for UK SMEs every day, so Teams calling isn't a bolt-on skill for us — it sits naturally alongside cloud email, security and device management we already handle for clients.
We advise honestly on Calling Plans, Operator Connect or Direct Routing based on your actual call volumes and contracts, not whichever route is quickest for us to deploy.
Number porting and migration are planned and staged, so your team moves across without dropped calls, confused customers or lost voicemail history.
Every Teams calling setup is backed by our managed IT support plans — 24/7 monitoring, a 99% SLA guarantee and EDR endpoint protection — so call quality issues get caught and fixed quickly.
You keep one point of contact for Teams calling, your wider Microsoft 365 environment and your general IT support, rather than juggling separate suppliers who each blame each other when something breaks. That single point of contact matters most in the first few weeks after go-live, when small configuration tweaks — a call queue that needs adjusting, a user who needs a different licence — are still common and best resolved quickly.
Teams Calling & IT Support Packages
Teams calling setup is quoted around user numbers and connectivity route, and typically sits alongside one of our managed IT support plans below.
Essentials
Core managed IT support and monitoring
£20/ user / month
- 24/7 monitoring
- 99% SLA guarantee
- EDR endpoint protection
- Teams calling setup & support
- Cloud backup
Most Popular
Assurance
Includes Teams calling setup and cloud backup
£40/ user / month
- Everything in Essentials
- Teams calling setup & support
- Cloud backup included
- Number porting managed
- Priority support
Ultimate
Full-service management for complex environments
£60/ user / month
- Everything in Assurance
- Multi-site call queue design
- Dedicated account manager
- Virtual CIO input on scaling
- Priority, fastest response SLA
Why Cloudswitched for Teams calling?
We treat your phone system with the same seriousness as your network and email. Here's what sets us apart.
Honest connectivity advice
We recommend Calling Plans, Operator Connect or Direct Routing based on your actual call volumes and contracts — not whichever is easiest for us to set up.
24/7 monitoring included
Your Teams calling setup is monitored round the clock as part of our managed IT support plans, with a 99% SLA guarantee behind it.
Deep Microsoft 365 expertise
We manage Microsoft 365 environments daily, so Teams calling integrates cleanly with your existing email, security and device policies.
Dedicated account manager
You'll never chase a ticket queue. Every client gets a named account manager as a direct point of contact throughout setup and beyond.
Transparent, per-user pricing
Managed IT support packages start from £20 per user per month, with clear tiers and no hidden fees, so budgeting is straightforward.
Migration planned around your business
Number porting and user rollout are staged so calls keep flowing throughout, rather than a single disruptive cutover date.
No vendor lock-in
Your numbers and licensing sit under your own Microsoft 365 tenant, so you keep control even if you ever want to change support provider.
Cloud backup included
Our Assurance and Ultimate plans include cloud backup as standard, protecting the wider Microsoft 365 environment your calling setup sits within.
Joined-up IT delivery
Teams calling, cloud networking, connectivity and general IT support are handled under one roof, so nothing falls between two suppliers.
Teams Calling Alongside the Rest of Your Setup
Microsoft Teams calling works best as part of a properly managed Microsoft 365 environment. If your business also needs reliable connectivity to support call quality, our leased line and broadband solutions can be reviewed alongside your calling setup. If email and file storage sit on Microsoft 365 too, our cloud email and Microsoft 365 backup services protect the wider environment your calling now depends on, and our virtual CIO service can help plan a wider move away from legacy phone systems across multiple sites.
Who Microsoft Teams calling is for
Most UK SMEs we work with are already paying for Microsoft 365 and a separate phone system side by side, often without realising Teams calling could replace the second cost entirely. Others are facing the switch-off of ISDN and analogue lines and need a replacement decided before their current contract runs out.
Sector mix: We've set up Teams calling for professional services firms with reception-style call handling needs, trades businesses managing a small team spread across sites, and growing companies wanting call analytics their old phone system never offered.
Delivery: Our Teams calling setup and support is delivered remotely for clients across the UK, with the same 24/7 monitoring and 99% SLA guarantee as the rest of our managed IT support.
Whether your business runs a single small office or several sites with shared call handling, the underlying approach stays the same: understand how calls actually flow through the business today, then configure Teams calling to match that reality rather than forcing the business to adapt to a generic default setup.
Coverage
UK-Wide, Remote-First
Wherever your business is based, our Teams calling setup and ongoing support is delivered remotely with the same reliability standards throughout.
Solution
Microsoft Teams Calling
microsoft teams calling
Teams Phone setup, number porting and call routing that turns Microsoft Teams into your full business phone system.
Related
Microsoft 365 Backup
microsoft 365 backup
As calling moves into Microsoft 365, protecting that environment with proper cloud backup becomes just as important as the calling setup itself.
Frequently Asked Questions
Got questions about Microsoft Teams calling? We've answered the most common ones below. If you need more detail, get in touch.
What's the difference between Teams calling and a regular VoIP phone system?
Teams calling is Microsoft's own phone system built into Teams, so calls, chat and meetings all live in one app you're likely already using. A standalone VoIP system is a separate platform that may or may not integrate cleanly with Microsoft 365.
How much does Microsoft Teams calling cost?
Setup and support are typically included as part of our managed IT support plans, which start from £20 per user per month. Microsoft licensing and calling plan costs are additional and depend on your call volumes — we'll quote clearly upfront.
Can we keep our existing phone numbers?
Yes, in almost all cases we can port your existing business numbers across to Teams calling, timed carefully so there's no gap in service for incoming calls.
Do we need new hardware or headsets?
Not necessarily. Calling works from the existing Teams desktop and mobile apps with a headset, and many laptops already have adequate microphones. Certified desk phones and headsets are available where teams prefer physical hardware.
Why do we need to move off our current phone line?
The UK's traditional analogue and ISDN phone network is being phased out, meaning existing lines will eventually stop working. Moving to Teams calling ahead of that deadline avoids a forced, rushed migration later.
Is Teams calling reliable enough for a busy reception desk?
Yes, with call queues, auto attendants and proper connectivity configured, Teams calling handles reception-style call volumes well. We size the setup and connectivity to your call volumes rather than a generic default, and monitor performance closely in the weeks after go-live.
Does this work for a business with more than one site?
Yes, call queues and auto attendants can route between sites, and users can be based anywhere with a Microsoft 365 licence, making it well suited to multi-site or hybrid-working businesses.
What happens if call quality drops?
Call quality issues are monitored as part of our 24/7 support, backed by a 99% SLA guarantee — most causes trace back to network connectivity, which we can also review and improve as part of your wider IT support.
Free On Boarding worth up to £2,000!
Limited time offer — valid until 31/05/2026
Get in touch about Microsoft Teams calling for your business
We believe that communication is key to any successful partnership. Submit your details and one of our friendly team members will be in touch with you shortly.
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