1x IP Telephony Market Size, Share & Trends Analysis Report by Offering (Solutions, Services) by Type (Integrated Access/Session Initiation Protocol (SIP) Trunking, Managed IP PBX, Hosted IP PBX) by Call Type (International Calls, Domestic Calls) by Installation Type (Wired, Wireless) by Enterprise Size (Large Enterprise, Small & Medium Enterprises) by End User (Corporate, Government, Residential) by Region (North America, Europe, Asia Pacific, Latin America, Middle East & Africa) - Global Industry Assessment (2017 - 2022) & Forecast (2023 - 2030)