What is Voice over Internet Protocol (VoIP)? Is a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks.

Aastra 6739i SIP Touch Screen Phone Overview

Aastra 6739i - The Aastra 6739i is an executive level desktop SIP / VoIP phone. The phone has a 5.7" high-resolution VGA color touch screen display with on screen QWERTY keyboard and touch screen softkeys. This phone has a built in bluetooth ada...

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