Phone system for teams

Take advantage of intelligent communications with Microsoft Teams. Teams empower your organisation to work from anywhere through collaborative tools like chat, screen share, video calls, meet, voice calls and inbuilt apps all in one place. It’s the new culture of teamwork.

Why Phone System for Teams?

With Phone System for Teams, you get PBX capabilities including call control in Office 365. Phone System users can use their mobile devices, a headset with a laptop or PC, or one of many IP phones, including legacy systems, that work with Microsoft Teams.

Direct Routing Services from Blackstar Solutions allows you to unlock the collaboration capabilities of Phone System for Teams and improve productivity.

Direct Routing Service

Direct Routing Services allows you to connect between your on-premise PSTN or SIP trunk and the Microsoft Phone System for Teams. This is achieved using a physical or virtual Session Border Controller (SBC) located either on-premise or in the cloud. This allows your organisation to make external calls using Microsoft Teams.

Easily connect existing legacy hardware such as third-party PBXs to Teams using Direct Routing Services, whilst keeping your existing phone numbers.

Blackstar uses Microsoft Certified  Session Border Controllers.


Choice with Microsoft Teams

With Direct Routing Services from Blackstar Solutions, we’re giving you choice in Microsoft Teams. We understand that organisations communicate differently and calling in Teams is no different.

That is why with Blackstar you can choose:

  • between a private or cloud-hosted Session Border Controller
  • whether you want to move your entire phone system to Teams or integrate Teams into your current phone system
  • if you need to international SIP if you have an international presence or UK SIP

We’re all about giving you choice, book a Discovery Session for an in-depth discussion into your requirements or find out more by clicking the link below.

We're a Microsoft Certified Partner

We’re an authorised Microsoft partner, supplying, implementing and supporting Phone System for Teams as well as exceptional knowledge of the required Microsoft licenses.

Our Direct Routing service is fully certified by Microsoft. The Session Border Controllers (SBCs) that we use to connect our SIP Trunks to Microsoft Teams are Microsoft certified.

We’ve been enabling calling in Microsoft Teams from the start and are experienced in Microsft Teams deployments.

Choose a Microsoft partner you can trust. We’re rated ‘Excellent’ on Trustpilot.

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Microsoft Teams Benefits


Share documents, send instant messages, schedule meetings and make video calls from anywhere.

App Integration

Add any of the Office 365 apps into Teams such as OneNote, Planner, Dynamic, Excel and Word as well as third-party apps such as Twitter, Mailchimp and Google Analytics.

Phone System

Make calls on a global scale with Phone System for Teams and Direct Routing . Services and move away from the restrictions of your PTSN service.

Work From Anywhere

Work is no longer tied down to an office, empower your employees to work from anywhere. Cut down on travel, offer a work-life balance, and encourage collaboration.

Introducing Teams

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Superb Customer Service, With Extremely Tight Timescales!

“Blackstar Solutions delivered our new phone system. We migrated away from ageing, deprecated internal phone system to Microsoft Teams with Phone System.  The Blackstar team were professional and punctual throughout. Excellent communication from their engineers, who knew exactly the timescales and issues we were facing.  Would definitely recommend!”

Jake Bloomfield – Stirling Dynamics

Enabling Voice in Microsoft Teams

Speaking at TechFusion, Alex Higham from AudioCodes provides an overview of Direct Routing Services, how it works with an SBC and the benefits of deploying it.

He also covers the call capabilities, call recording, resilience and the AudioCodes product set compatible with Microsoft Teams.

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Benefits of Direct Routing Services with AudioCodes

Phased migration – with Direct Routing you can opt for a phased approach when migrating users to Teams. AudioCodes have developed a software application to make the process quick and simple.

Monitoring and Reporting – AudioCodes’ One Voice Operations Centre (OVOC) provides a centralised management tool to monitor call quality closely and deliver a quality of experience.

Media Bypass – reduce the traffic flowing to and from Microsoft datacentres by routing call media directly to the SBC. This dramatically increases call quality.

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Make the move to intelligent communication.