Microsoft Teams Voice

Unite your existing lines and systems with your favourite Teams communications features.

Young-Man-Video-Call-Smiling-Cornerstone-Square

Call customers and colleagues from the same great Teams interface.

No more juggling apps or switching screens—just pick up the call right from where you chat, meet, and collaborate.

Whether you're ringing a client or catching up with the team, Microsoft Teams Voice keeps everything in one place, so you sound sharp and stay in control.

Our customers

Built for growing Teams, not growing pains.

From first call to full rollout, Teams Voice keeps your business sounding sharp and scaling smoothly.

Fast deployment

Get set up quickly with minimal disruption—no tech headaches or downtime.

Smart Call Routing

Direct calls where they need to go with intelligent menus and call flows.

Work anywhere

Take and make calls from Teams on desktop, mobile, or desk phone.

Call handling like a pro

Custom greetings, voicemail, and call queues that make you sound the part.

Flexible Options

Choose Direct Routing or 3CX—whichever fits your setup and feature needs.

Reliable & secure

Built on Microsoft’s backbone, with One2Call’s support baked in.

Teams Voice FAQs

Got a question about voice calling for Microsoft Teams you've always wanted answered?

Send us your question and we'll answer it for you!

What is Microsoft Teams Voice?

Microsoft Teams Voice turns Teams into your business phone system. You can make and take external calls, set up call menus, and manage everything in one place—no extra apps needed.

Do I need new phone lines or hardware?

Nope. We can connect your lines and numbers directly to Teams using Direct Routing, which is more cost-effective than Microsoft's own licence-based model. Alternatively we can upgrade you to 3CX phone system, a cost-effective phone system which is widely compatible and integrates with Teams. Either way, you can keep your numbers and often many of your devices.

What’s the difference between Direct Routing and 3CX?

Direct Routing connects your phone lines straight into Teams. 3CX adds extra features like advanced call reporting, wallboards, and contact centre tools. We’ll help you choose what fits best.

Is Microsoft Teams Voice good for small businesses?

Absolutely. It’s ideal for SMEs who want a professional, flexible phone system and collaboration suite all in one place, without the big-business price tag.

Can I keep my existing phone numbers?

Yes. We’ll port your numbers over so your customers won’t notice a thing—except better call quality and faster answers.

How long does setup take?

Most businesses are up and running in days, not weeks. We handle the tech side so you can focus on running your business.

Our partners and credentials

Our latest stats

(June 2025)

99min

Average time to response

6h

Average time to resolution

%

Customer satisfaction score (CSAT)

89

NPS score (scale -100 to 100)

Knowledge Base

Browse our latest news, blogs and resources.

Resources

Are your business devices fully up-to-date and secure?

Are you stuck in Patch 22? More business needs more devices, but more devices means more security patching? Read about how to avoid Patch 22.

Company News

One2Call Named Finalist at South Yorkshire Apprenticeship Awards 2025

One2Call Ltd has been named afinalist in the South Yorkshire Apprenticeship Awards 2025, shortlisted in the highly competitive SME Employer of the Year categor

Resources

Cyber Essentials 2025: What SMEs need to know about the upcoming changes.

Significant changes are coming to the Cyber Essentials certification with the introduction of the Willow Question Set. Learn more about how this will affect your business.

Customer

Sheffield United Football Club

Industry

Hospitality

Challenge

Threat to matchday revenues from network visibility and vulnerability issues. Inefficiencies from separate telecom systems.

Results

Network resilience and visibility improved. Match day experience improved. Cost-savings identified and enacted.

View Case Study

Customer

Heron Lakes Luxury Lodges

Industry

Real Estate

Challenge

Unreliable, wind-sensitive internet and poor third-party service, causing resident complaints and generating no revenue.

Results

Scalable, high-speed internet solution, boosting reliability, revenue and resident satisfaction.

View Case Study

Accountant at work using a laptop, clipboard and calculator

Customer

Morton Bradley Accountants

Industry

Financial Services

Challenge

Outdated infrastructure, non-compliance, and scalability issues.

Results

Secure, scalable IT system improving compliance, productivity, client trust, and data protection.

View Case Study

Microsoft Teams Voice

Call customers and colleagues from the same great Teams interface.

Our customers

Built for growing Teams, not growing pains.

Fast deployment

Smart Call Routing

Work anywhere

Call handling like a pro

Flexible Options

Reliable & secure

Ready for a chat?

Teams Voice FAQs

What is Microsoft Teams Voice?

Do I need new phone lines or hardware?

What’s the difference between Direct Routing and 3CX?

Is Microsoft Teams Voice good for small businesses?

Can I keep my existing phone numbers?

How long does setup take?

Our partners and credentials

Customer reviews

Our latest stats

99min

6h

%

89

Knowledge Base

Are your business devices fully up-to-date and secure?

One2Call Named Finalist at South Yorkshire Apprenticeship Awards 2025

Cyber Essentials 2025: What SMEs need to know about the upcoming changes.

Case Studies