In order to make phone calls via the Internet one’s device has to be compatible with Softphone software. In example in order to call from a PDA using VoIP technology one has to install Softphone software, in order for it to work properly, PDA has to have Softphone compatibility.
TELES Communication Systems
TELES Communication Systems is a leading provider of equipment, solutions and services to fixed, fixed-mobile convergence and Next-Generation-Network (NGN) service providers. With more than 160 carrier network customers and millions of voice ports deploye
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