Turn Microsoft Teams into your business phone system — call queues, auto attendants, number porting and mobile calling, set up and supported by Cloudswitched.
We port your existing landline and mobile numbers into Microsoft Teams so customers keep dialling the number they already know, with no gap in service during the switch.
Call queues, auto attendants, direct routing and calling plans configured and tested before go-live, so your team makes a clean switch from an old phone system to Teams calling.
Once you're live, our 24/7 monitoring and helpdesk keep call routing, licensing and voice quality running, so a phone problem doesn't sit unresolved.
A Microsoft Teams phone system turns the Teams app your staff already use for chat and meetings into a full business telephone system — inbound and outbound calling, call queues, auto attendants and voicemail, all inside the same app as your calendar and messages. For a UK business still running an ageing on-premise phone system or paying for lines it doesn't fully use, moving calling into Teams means one login, one app and one bill for chat, meetings and phone calls, with calls answerable from a desk phone, a laptop or a mobile wherever staff are working. We handle the licensing, number porting, call flow design and ongoing support so the switch is straightforward rather than a project your team has to run themselves.
It also removes a genuine headache: juggling a separate phone system supplier, a separate contract renewal date and a separate point of contact from the rest of your IT. When calling lives inside Microsoft 365, the same team that manages your email, devices and security can manage your phones too, which means fewer suppliers to chase when something needs changing and one place to look when something goes wrong.
Most businesses already use Microsoft Teams for chat and video meetings; adding calling means staff aren't juggling a separate phone system, a separate app and a separate login just to make a call. A teams phone system also solves a problem that's becoming urgent across the UK: openreach is retiring the traditional PSTN phone network, and businesses still relying on old analogue or ISDN lines need a plan for what replaces them. Moving calling into Microsoft 365 gets ahead of that change rather than reacting to it at the last minute.
There are two main ways to get PSTN calling into Teams: Microsoft Calling Plans, where Microsoft supplies the phone numbers and minutes directly, or Direct Routing, where a certified SBC connects your existing numbers and a chosen carrier into Teams. We assess call volumes, existing contracts and number requirements to recommend whichever route gives you the best combination of cost, control and call quality — there isn't a single right answer for every business.
A teams phone system isn't just "calls that ring one person's laptop" — call queues route incoming calls to a group of staff in order or all at once, and auto attendants greet callers and route them by department without a human picking up first. We design the call flow around how your business actually operates, not a generic default menu.
Some staff want a physical desk phone; others are happy taking calls through the Teams app on a laptop or mobile. A teams phone system supports both, and we help you decide where certified desk handsets are worth the cost and where a softphone is genuinely enough.
A teams phone system gives you visibility a legacy phone system rarely does — call volumes, queue wait times, missed call reports and staff availability, all viewable through Microsoft's own reporting tools. That means a manager can actually see whether a busy queue needs another person answering, rather than guessing from customer complaints about calls not being picked up.
The core building blocks we configure so calling in Teams works the way your business needs it to.
Before touching any licences, we map how calls should actually move through your business — who answers, what happens after hours, what gets routed to voicemail — so the system matches how you work rather than a generic template.
Numbers are ported and call routing tested in parallel with your existing phone system wherever possible, so there's no dead period where calls simply don't arrive anywhere.
From first conversation to a live Teams phone system — our process keeps disruption to a minimum.
We review your current phone system, call volumes, existing numbers and contracts, and map out what a teams phone system needs to replace.
We design call queues, auto attendants and routing rules around your business, and choose between Direct Routing and Calling Plans.
Licensing, call flows and hardware are configured, and numbers are ported across with minimal disruption to inbound calls.
Your team switches over with training on the new system, and our helpdesk monitors and supports calling going forward.
We work with Microsoft 365 environments every day, so a teams phone system rollout sits alongside cloud email, file storage and device management we may already be looking after — not a separate project handled by a separate supplier.
We assess Direct Routing and Calling Plan options honestly, based on your call volumes and existing contracts, rather than defaulting to whichever is easiest for us to set up.
Number porting is planned and tested carefully, because a botched port that drops inbound calls even for a few hours is a real cost to a business, not just an inconvenience.
Once you're live, 24/7 monitoring and our helpdesk mean voice quality issues, licensing changes and call routing tweaks get picked up quickly rather than becoming a recurring irritation.
Cloud backup and cyber security sit alongside your phone system as part of our wider managed IT support, so the systems your business depends on are looked after as one package, not several.
We also think about growth from day one. Adding a new starter, opening a second office or scaling up a busy call queue at short notice shouldn't mean re-engineering the whole phone system — we design licensing and call flows so they extend cleanly as your business changes shape.
We look after phone systems as part of wider managed IT support, not as a one-off install we walk away from.
We recommend Direct Routing or Calling Plans based on your actual call volumes and contracts, not whichever is quickest for us to configure.
Ports are planned and tested so inbound calls keep flowing throughout the switch — no dead period where customers can't reach you.
Queues and auto attendants are designed around how your team actually answers calls, not a generic default menu.
We already manage Microsoft 365, security and devices for many clients, so your phone system sits inside the same managed environment, not a separate silo.
You get a consistent account team who understand your call flows and licensing, not a rotating queue of unfamiliar engineers.
Call flows and licensing are designed to add new users and sites easily, without redesigning the system every time you grow.
Use desk phones, softphones or a mix of both — we configure the system around your preferred devices, not a single proprietary handset.
24/7 monitoring covers voice quality and call routing so issues are flagged and fixed before they interrupt calls to customers.
You'll get a clear, itemised quote covering licensing, porting and support before any work begins — no vague estimates.
A teams phone system rarely sits in isolation — it depends on a stable internet connection, well-managed Microsoft 365 licensing, and a network that can carry voice traffic reliably alongside everything else your business runs. We look at connectivity, cloud networking and cloud email together with your phone system, so call quality doesn't suffer because of a congested network or an underlying connectivity issue nobody's looked at.
A growing number of UK businesses are replacing traditional phone systems with Microsoft Teams calling, partly because it's genuinely simpler for staff, and partly because the phased retirement of the UK's traditional PSTN telephone network means analogue and ISDN lines are becoming a dead end. Getting ahead of that shift, rather than waiting until an existing line stops being supported, gives a business time to plan number porting and call flows properly.
Cost is usually the first question. A teams phone system is typically priced per user, per month, on top of an existing Microsoft 365 subscription, rather than as a large upfront hardware purchase — closer to a software subscription than a traditional phone system contract. That makes it easier to budget for, and easier to scale up or down as headcount changes, without a phone system provider tying you into lengthy hardware finance agreements.
What affects setup: the number of users needing calling licences, whether you need Direct Routing for existing contracts, how many numbers need porting, and how complex your call queue and auto attendant requirements are.
Who this suits: businesses already using Microsoft 365 for email and files, multi-site businesses that want one phone system rather than several, and any business with staff working remotely or across more than one location.
How we deliver it: remote-first for businesses across the UK, with London on-site coverage for hardware installs and issues that genuinely need a person in the building.
Delivery model
Teams phone system setup and support wherever you're based, with London on-site visits available for hardware and desk phone installs.
teams phone system
Business calling built into Microsoft Teams, with call queues, auto attendants and number porting configured and supported by Cloudswitched.
business VoIP
Cloud calling and connectivity solutions for UK businesses moving away from traditional phone lines onto managed, monitored VoIP systems.
Got questions about a Teams phone system? We've answered the most common ones below. If you need more detail, get in touch.
It's business telephone calling built into Microsoft Teams, so staff can make and receive calls to and from ordinary phone numbers directly from the Teams app, alongside chat and video meetings, without a separate phone system or app.
You need a calling plan add-on or Direct Routing configured alongside a qualifying Microsoft 365 licence. We review your current licensing and tell you exactly what needs adding before any work starts.
A Calling Plan means Microsoft supplies your numbers and minutes directly. Direct Routing connects your existing numbers and a chosen carrier through a certified SBC. We recommend whichever suits your call volumes and existing contracts.
Yes, in almost all cases we can port your existing landline and mobile numbers into Teams calling, with the port planned and tested so inbound calls keep arriving throughout the switch.
The UK's traditional PSTN network is being retired, meaning analogue and ISDN lines will stop being supported. Moving your calling into a teams phone system now avoids a last-minute scramble when that happens.
No — staff can make and take calls from the Teams app on a laptop or mobile wherever they have an internet connection, using the same business number as if they were in the office.
Not necessarily. Many businesses run calling entirely through the Teams app on laptops and mobiles. Certified desk handsets are available where staff genuinely need a physical phone.
24/7 monitoring and our helpdesk cover voice quality, call routing and licensing changes after go-live, as part of our wider managed IT support.
Limited time offer — valid until 31/05/2026
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