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.
Voice Over IP (VOIP) communications have became the major trend in international calling. As the IP communication is done over internet, good internet connectivity with high bandwidth is required to ensure good quality of service. This is where our Optima
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