Rates of the call shop are usually defined by the administrator, but the rate plans are managed in the main database of the billing system. All the rates are dependent on the charging policy; in case of a destination based billing rates are specified according to the area codes in the supported destinations.
FreelyCall - Free and low rate calls all over the world!
Free Internet and Video Calls, Free Conferencing and Online Numbers, Cloud PBXes, Hosting Solutions