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.
Our company is involved in many different areas of business. We have 3 main divisions and 9 subdivisions. We are located in various major cities around the world through main offices and partner offices. Our main offices are in Shanghai, China. We hav
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