Ribbon SBCs acting as a registrar provides Yealink Microsoft Teams SIP phones with the ability to make phone calls without being connected to the Microsoft Phone System.

Ribbon's Microsoft Teams Direct Routing technology enables end-customers to securely connect external phone lines and use Teams as their office phone system.

You can use Teams as a phone system (and as long as Microsoft doesn't drop a clanger it works quite well IMO), but I'm not aware of the ability to use Teams itself a softphone client.

Realizing its Windows Mobile software no longer would cut it, the company threw it away and developed a new operating system, Windows Phone 7, which recently was updated to 7.5.

Teams Phone, a licensed add-on to Microsoft Teams, is the market leader in cloud calling, with more than 80 million monthly active users.

Microsoft may also use the Build conference to update software developers on the company’s plans to integrate the Windows Phone 8 system for smartphones, the Windows 8.1 system for tablets ...

HTC said it developed the new model at the request of Microsoft, which has been trying to boost its Windows Phone system. The company will continue to make an Android version of the One, as well ...

To bridge the divide between the phone system and Windows 8.1 for larger devices, Microsoft unveiled tools to let software developers adapt apps for the various devices more easily. App developers ...

Andy Lees, President of Windows Phone at Microsoft has been moved into a new role that bridges Windows Phone and Windows 8. It's hard to tell if this is a promotion or a demotion; this could be a ...