The basic idea behind a Call Shop business is to have a place where customers can make local, long distance or international phone calls. The main sources of revenues will come from the minutes customers are going to spend on the phone. So it all depends on the rates that you are going to setup, just make sure that they are lower than the ones offered by the providers of international call services.
GCCOM offers affordable and reliable VoIP solutions for the small and large business alike, using same quality and reliability already experienced for voice and fax through local telephone companies.