Unified Communications & Collaboration (UCC) Market Size By Platform (Telephony [IP Phones, IP Private Branch Exchange (PBX)], Collaboration [Mobile, Social Network, Video Platform], Unified Messaging [Voicemail, Email, Fax], Conferencing [Audio, Video, Web], Services & Tools), By Deployment Model (On-premise, Cloud/Unified Communications as a Service (UCaaS), Hybrid), By Application (IT & Telecom, BFSI, Public Sector, Retail, Healthcare, Education), COVID-19 Impact Analysis, Regional Outlook, Growth Potential, Competitive Market Share & Forecast, 2022 – 2028