Answer:
Skype for Business (new-generation Lync client), Lync2013, and Lync2010 are corporate-level unified communications platforms released by Microsoft. Lync Online (a part of Office 365) is Microsoft's high-end cloud service as well as an application suite based on the cloud platform.
This suite can deliver communications services by audio, video, and data to devices, such as PCs and smartphones. Based on Microsoft's protocols and processes, the PXP Integrated Media Server is taken as the gateway that enables 720p 30 fps video communication between the endpoint and Lync clients, including Skype for Business (new-generation Lync client), Lync2013, Lync2010, and Lync Online (Office 365).
Enterprises that have the Lync platform deployed can access the videoconferencing system using devices, such as PCs, smartphones, and tablets.
