Plantronics have released a set of apps for Windows that integrates with Lync and sets your presence depending on what you do with it.
First start with install the Spokes Software for Windows
Today Plantronics software delivers enhanced operability and audio to further enhance products across our portfolio. Spokes enables the integrated call control features for Plantronics audio devices including call answer/end and synchronized mute with your softphone.
For complete release notes, click here.
Then install the Smart Presence for Microsoft Lync 2013
It´s an application from Plantronics that provides enhanced presence capabilities for Microsoft Lync 2013 when used with Plantronics Spokes for Windows software and Plantronics headsets. Features include changing Lync 2013 presence status to IN A CALL when you are on a mobile, desk phone or another softphone call using a supported Plantronics headset. Earlier versions of Microsoft Lync and Office Communicator do not require this application software.
For Windows Desktop and it also downloads from <http://www.plantronics.com/us/support/software-downloads/business-windows.jsp>
Tip: Remove some of the legacy stuff that is included by Plantronics, no one uses legacy anyways right
When both apps are installed you will find them on your start page
And if you launch the Plantronics Control panel you can do some settings from there