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.
Elmer Sinaza is a provider of TDM and VoIP phone calls. Using most recent technologies and extensive relations, Elmer Sinaza permits to cut the costs of phone calls considerably.
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