Unified Telephony and Collaboration (UCC) Market (By Platform: Telephony [IP phones, IP PBX], Collaboration [Mobile, Social network, Video platform], Unified messaging [Voicemail, Email, Fax], Conferencing [Audio, Video, Web], Services and tools; By Deployment Model: On-premise, Cloud, Hybrid; By Application: IT & telecom, BFSI, Public sector, Retail, Healthcare, Education) - Global Industry Analysis, Market Size, Opportunities and Forecast, 2018 - 2026