How Microsoft Teams Calling Actually Works for Small Teams?

If your team already lives in Microsoft Teams for chat and meetings, there's a good chance you've wondered: can we just make and receive phone calls in here too? The short answer is yes, but it's worth understanding what's actually happening behind the scenes before you set it up, especially for a small team where every seat and every pound or dollar of spend matters.

Here's a plain-language breakdown of how it works.

Teams calling vs. Teams meetings: they're not the same thing

Out of the box, Microsoft Teams handles internal chat, video meetings, and calls between people inside your organisation. But that's not the same as being able to call or receive calls from an actual outside phone number: a customer ringing your business landline, or your team calling a client's mobile.

To do that, Teams needs to be connected to the public phone network. That connection is what turns Teams from an internal collaboration tool into a full business phone system.

3 ways to connect Teams to real phone numbers

1. Microsoft Calling Plans: Microsoft's own add-on, billed per user, with calling minutes bundled in.

2. Operator Connect: a simplified way for a telecom provider to plug their network into your Teams tenant, managed largely through the Teams admin centre.

3. Direct Routing: a more flexible setup where a third-party provider (like Mobex) connects your existing or new phone numbers to Teams, often at a lower cost and with more control over configuration.

For small teams, the difference usually comes down to cost, flexibility, and how much hands-on setup you want to deal with. Calling Plans are the simplest but often the most expensive per user. Direct Routing tends to offer more competitive pricing and lets you keep existing numbers, which matters if your business has had the same contact number for years.

What changes day-to-day once it's set up

Once your Teams tenant is connected to the phone network, a few things become possible that weren't before:

• Anyone on the team can make or receive calls to real phone numbers, from the Teams app on desktop or mobile; no separate phone or app needed

• Calls can be routed based on availability, so a missed call doesn't just disappear

• Voicemail, call transfer, and hold all work the way they would on a traditional desk phone

• New starters can be given a business number in minutes, not days

For a small team, this usually means fewer physical desk phones, one app to manage instead of three, and the flexibility for people to take business calls from home or on the move without giving out a personal mobile number.

What to check before you set it up

• Licensing: most calling setups require at least a Microsoft 365 Business plan alongside a calling add-on or third-party connection

• Call quality: this depends on your internet connection, so it's worth checking bandwidth if your team is on a busy shared network

• Existing numbers: confirm whether your current business numbers can be ported across, so you're not starting from scratch

• Support: if something goes wrong with a call routing issue, know who you're calling (not through Teams, ideally)

Where Mobex fits in?

Mobex sets up Microsoft Teams calling for small businesses using Direct Routing, which means you get full calling functionality inside Teams, while keeping your existing phone numbers intact. We handle the technical setup so your team can just start using Teams as their phone system without wrestling with configuration or admin settings.

If you're already using Teams for meetings and chat and want to bring calling into the same app, get in touch via www.mobex.biz and we'll walk you through what it would look like for your setup.