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.
Zycoo is the leading manufacture of IP-PBX Products. Our products line including VoIP Phone, Telephony Cards and IP PBX.
With the high voice quality, stable performance and competitive price, our products have been adopted by many carriers and ISP fro