With PSTN usage records, we specify what is managed as a local call, a long distance call, an international call and so on. We must connect PSTN usage records with voice policies (assigned to users) and routes (assigned to phone numbers). What we are going to see now is a possible sequence of steps to configure voice policies and PSTN usages. However, there is no fixed order in Lync, so there is no single way to organize the various aspects of Enterprise Voice. Microsoft TechNet offers some information, starting with the Deploying Enterprise Voice in Lync Server 2013 post at http://technet.microsoft.com/en-us/library/gg412876.aspx. The suggested order in the previously mentioned document is as follows: