3 cardioid microphones 
Loudspeaker 
– Frequency 180-14,000 Hz 
– Volume: 90 dB at 0.5m peak volume, 14ft/4.3m microphone pickup range 
Supported codecs: 
– G.711 (A-law and μ-law) 
– G.722 
– Polycom® Siren™ 7 
Polycom® HD Voice™ 
Polycom Acoustic Clarity technologyprovides full-duplex conversations,acoustic echo cancellation andbackground noise suppression— 
Type 1 compliant (IEEE 1329 full duplex) 
Polycom® NoiseBlock™ 
Voice activity detection 
Comfort noise generation 
DTMF tone generation (RFC 2833and in-band) 
Low-delay audio packet transmission 
Adaptive jitter buffers 
Packet loss concealment 
Bluetooth device pairing for widebandspeech and multimedia streaming(HFP/AD2P) 
Call handling features 
Up to 3 lines (max. 1 Skypefor Business) 
Shared call/bridged line appearance 
Distinctive incoming calltreatment/call waiting 
Call timer and call waiting 
Call transfer, hold, divert(forward), pickup 
Called, calling, connectedparty information 
Local five-way audio conferencing 
One-touch speed dialDo-not-disturb function 
Local configurable digit map/dial plan 
Corporate directory access using LDAP 
Visual conference management 
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