This is a Voice over Internet Protocol (VoIP) and streaming media service based on the Session Initiation Protocol (SIP) by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and Unified Communications facilities
VoIP Thailand is the No.1 PABX IP-Telephony Solutions provider for small, medium & enterprise businesses in Thailand. Cloud IP-PBX systems for office & call centers. Find out more at www.voip-thailand.com