Vietnam IP Phone Market Assessment, By Product Type [Hardware Handset (Non-Video Desktop IP Phones), Hardware Video Desktop IP Phones, Conference IP Phones (Multi-mic / Room Endpoints), Others], By Connectivity Type [Wired IP Phones, Wireless IP Phones], By End-Use Application [Large Enterprises (Banks Corporates MNCs), Hospitality and Retail Chains, Small and Medium Enterprises (SMEs), Government Offices and Ministries, Education and Healthcare Institutions, Others], By Distribution Channel [Offline, Online], By Region, Opportunities and Forecast, 2018-2032F