It is a call which is made over internet protocol (VoIP). For example,
one can call using Google Voice to other recipient located miles away. Such
call can also be international.
NexTone Communications
NexTone provides intelligent, secure next generation IP and IMS network interconnects that enable new revenue streams from VoIP and multimedia services. Our technologies enable a common way to exchange, secure, monitor, control, and bill for voice and mul
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