Mô tả	VVX 310
Product Specifications

User interface features	• Backlit 8-level Grayscale graphical LCD (208 x 104) resolution • Voicemail support1 • WebKit-based browser • Adjustable base height • Unicode UTF-8 character support. Multilingual user interface including Chinese, Danish, Dutch, English (Canada/ US/UK), French, German, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Slovenian, Spanish, and Swedish

Audio features	• Polycom® HD Voice™ technology delivers lifelike voice quality for each audio path- handset, the hands-free speakerphone, and the optional headset2 • Polycom® Acoustic Clarity™ technology providing full-duplex conversations, acoustic echo cancellation and background noise suppression – Type 1 compliant (IEEE 1329 full duplex) • Frequency response – 150 Hz – 7 kHz for handset, optional headset and hands- free speakerphone modes • Codecs: G.711 (A-law and μ-law), G.729AB, G.722, G.722.1, iLBC • Individual volume settings with visual feedback for each audio path • Voice activity detection • Comfort noise generation • DTMF tone generation (RFC 2833 and in-band) • Low-delay audio packet transmission • Adaptive jitter buffers • Packet loss concealment

Headset and handset compatibility	• Dedicated RJ-9 headset port • Hearing aid compatibility to ITU-T P.370 and TIA 504A standards • Compliant with ADA Section 508 Subpart B 1194.23 (all) • Hearing aid compatible (HAC) handset for magnetic coupling to hearing aids • Compatible with commercially available TTY adapter equipment