The Dialing Rule Optimizer is a free tool which makes your Lync enterprise voice deployment much easier.
According to the creator of the tool Ken Lasko (Lync MVP), The Lync Dialing Rule Optimizer is designed to take care of 95% of the typical setup required to make Enterprise Voice work in Lync Server 2010. It takes advantage of the knowledge gained from multiple deployments from several Lync professionals on the best way to do things in Lync. All this knowledge is funnelled down into a simple set of options that outputs a PowerShell script that takes care of almost all the work for you.
Depending upon the simple inputs you give, the program does all the hard work for you. Really worth checking out the tool!
The tool does support quite a lot of countries.