DUBLIN--(BUSINESS WIRE)--Research and Markets has announced the addition of the "VoIP Services (Domestic VoIP Calls and International Long Distance VoIP Calls) Market 2015 - 2021" report to their offering. The report covers forecast and analysis for the VoIP services market on a global and regional level. The study provides historic data of 2015 along with a forecast from 2016 to 2021 based on revenue (USD Billion). The study includes drivers and restraints of the VoIP services market along wit