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
Antratel brought to life a new technology - access to VOIP EXCHANGE. Now, Antratel customers have access to VOIP EXCHANGE and can choose personally right price and quality for calls termination from thousands offers of telecom companies!