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
ZGroup
Z ITSP empowers people to communicate to and from anywhere at the finest quality price mix. Z ITSP operates around the clock and around the globe creating one of the most advanced marketing and distribution channels to promote communication services and p
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