Want to know more about Call Quality Methodology? It's time to go through the updated version of Lync Server Networking Guide v2.
What is CQM?
CQM is a holistic way to systematically define and assert call quality based upon the methods outlined in the Networking Guide. CQM divides a Lync implementation into ten discrete areas that impact quality, defining targets and a remediation plan for each one. CQM is a framework to tackle call quality problems – you can modify or extend it to address the particular conditions on your network.
For more details: http://blogs.technet.com/b/nexthop/archive/2013/10/21/announcing-the-release-of-the-lync-server-networking-guide-v2.aspx