Availability: In Stock Powerful Features in an Advanced, Expandable Executive Level IP Telephone. The Aastra 6739i, a new member of the carrier-grade, open-standards based 67xi SIP portfolio, brings leading edge communications technology to the desktop in a stylish global design. Featuring a 5.7” full color high resolution VGA touch screen display, the 6739i offers an intuitive graphical user interface, touch screen softkeys, full duplex wideband audio speaker and handset, dedicated LED indicators, builtin bluetooth interface and a USB port.