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.
Dialmonster.com is a leading long distance international DID (Direct Inward Dialing) and prepaid phone cards distributing company. The company was established in 2002 with the goal of developing secure and efficient business models that would allow custom
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