The Aastra 6739i, our latest member of the carrier-grade, open-standards based 6700i Series SIP telephone 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, built-in bluetooth interface and a USB port. Manufacturer: Aastra Technologies Limited. Manufacturer Part Number: A6739-0131-10-01. Brand Name: Aastra. Product Series: 67xi. Product Model: 6739i. Product Name: 6739i IP Phone. Product Type: IP Phone. [Technical Information] IP Phone Technology: VoIP. Connectivity Technology: Cable. Total Number of Phone Lines: 1. Multiple Conferencing: 3way. Caller ID: Yes. Speakerphone: Yes. Features: Indicator. Voice Mail. Echo Cancellation. Comfort Noise Generation. Packet Loss Concealment. Adaptive Jitter Buffer. Voice Activity Detection. Hearing Aid. Multilingual Menu. Distinctive Ringing. Call Waiting. Intercom. Page. Auto-answer. Voice Codec: G.711u. G.711a. G.729. G.722. BV32. BV16. L16. [Display & Graphics] Screen Type: LCD. Display Color: Color. Backlight: Yes. Screen Size: 5.7". Screen Resolution: 640 x 480. [Interfaces/Ports] Network (RJ-45): Yes. USB: Yes. Number of USB Ports: 1. Headset Port: Yes. PoE (RJ-45) Port: Yes. [Management & Protocols] Communication Protocols: SIP. SRTP. DHCP. SNTP. NAT. STUN. TURN. RTCP. LLDP-MED. Quality of Service: 802.1p/q. ToS. [Controls/Indicators] Buttons & Keys Type: Call Transfer. Conference. Service. Directory. Call History. Hold Button. Redial. Mute. Volume Control. Speaker. Option. Goodbye. [Physical Characteristics] Form Factor: Desktop. Wall Mountable. Height: 3". Width: 9.3". Depth: 8.2". Weight (Approximate): 2.37 lb. [Misc