Voice over Internet Protocol (VoIP) Market Size By Type (Integrated Access/Session Initiation Protocol (SIP) Trunking, Managed IP PBX, Hosted IP PBX), By Access Type (Phone to Phone, Computer to Computer, Computer to Phone), By Call Type (International VoIP Calls, Domestic Calls), By Medium (Fixed, Mobile), By End-Use ( Consumers, SMBs, Large Enterprises), By Application (IT & Telecom, BFSI, Healthcare, Government & Public Sector, Retail, Education, Hospitality), Industry Analysis Report, Regional Outlook, Growth Potential, Competitive Market Share & Forecast, 2019 - 2025