Configurations of GSM/VoIP networks allow the service providers to avoid the local Wired Public Switched Network (PSTN) in communication with a GMS mobile handset. As a result, the high rates charged by telephone companies are avoided.
ZZ is a well-established long distance telecommunications common carrier. ZZ`s strengths are derived from its ability to attract carriers of like interests through aggressively priced routes to difficult international countries and through its high qualit
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