Cloud Telephony Service Market to hit USD 47 billion by 2028 - Insights on Key Trends, COVID-19 Impact, Value Chain Analysis, Strategic Initiatives, and Future Outlook: Adroit Market Research Dallas, Texas, May 26, 2021 (GLOBE NEWSWIRE) -- The “Cloud Telephony Service Market by Network (Public Switched Telephone Networks (PSTNs), Voice Over Internet Protocol (VoIP)), Application...