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
Easytone Technology, Inc. (Hongkong), launched in 1997, is dedicated to the system integration of Internet/IP-Network Voice Solutions and value-added services among datacom and telecom fields.