Is one of message forms via the Internet; you only have to press the icon or button on the site and the connection with the operator will follow immediately. This function is often used on the websites for a quick connection.
According to the various market evaluations, the IP telephony market is respected to beyond seven billion dollars annually including VoIP (Voice over IP) equipment, protocol stacks, and IP telephony services. As a major vendor of the market for IP telepho
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