VoIP Software Market Report: By Technology (SIP Trunking, Managed PBX, Hosted PBX), Access Type (Computer to Phone, Phone to Phone, Computer to Computer), Call Type (Domestic VoIP Call, International VoIP Call), Medium (Fixed, Mobile), End User (Large Enterprises, SMEs, Consumers), Industry (IT & Telecom, BFSI, Government, Healthcare, Retail, Education, Residential) - Global Industry Analysis and Forecast to 2025