In the Lync 2010 client I was able to enable a "Collect Logs" button for gathering logs pertaining to voice quality.
http://blogs.technet.com/b/nexthop/archive/2010/12/10/collectlogs.aspx
I've looked everywhere and can't find any references for this option in the Lync 2013 client. Can anyone confirm if this has been removed from the 2013 client? Or are there different settings to turn it on for 2013 clients?