Poly 12-KEY Poly Ploy Soundstation DUO

POWER IEEE 802.3af Power over Ethernet External universal AC power supply: 100 - 240 V, 24 V, 0.5 A, 2.5 mm DC plug DISPLAY Size (W x H): 248 x 68 pixels White LED backlight with custom intensity control KEYPAD Standard 12-key keypad Context-dependent soft keys: 4 On-hook/Off-hook, conference, redial, mute, volume up/down, menu, 5-way navigation keys AUDIO FEATURES 3 cardioid microphones: 200 - 7000 Hz Loudspeaker frequency response: 220 - 7000 Hz 10 ft (3 m) microphone pickup Volume : Adjustable to 86 dB at 0.5 meter peak volume Full-duplex : Type 1 compliant with IEEE 1329 Individual volume settings with visual feedback for each audio path Voice activity detection Comfort noise fill DTMF tone generation/DTMF event RTP payload Low-delay audio packet transmission Adaptive jitter buffers Packet loss concealment Acoustic echo cancellation Background noise suppression Supported codecs : G.711 (A-law and Mu-law), G.729a (Annex B), G.722, iLBC 13.33 and 15.2kbps SIP CALL HANDLING FEATURES C