other side answering.) With normal internet protocols, you can have a network consisting of many routers (20 - 30 or more) which can result in a very high round trip time (RTT). In addition to standard IP, VoIP uses the real-time protocol (RTP) to help ensure that packets get delivered in a timely way. Using public networks, it is currently difficult to guarantee Quality of Service (QoS). Better service is possible Etna 56k , Etna, IN 56k EtnaEtna , 56k Indiana, Etna 56k
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