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
FreelyCall - Free and low rate calls all over the world!
Free Internet and Video Calls, Free Conferencing and Online Numbers, Cloud PBXes, Hosting Solutions