2N Helios IP Vario - Manual (Page 47)

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2N TELEKOMUNIKACE a.s., www.2n.cz
®
4. Technical Parameters
Signalling protocol
SIP (UDP)
Buttons
Button design – Stainless-steel push buttons
Count of buttons – 1, 3 or 6
Button extension – up to 54 buttons
Numerical keypad – optional
Audio
Volume control – Adjustable
Full duplex – Yes (AEC)
Audio stream
Protocols – RTP/RTSP
Codecs – G.711, G.729
Camera
Sensor – 1/4'' colour CMOS
Resolution – 640 (H) x 480 (V)
Picture frequency – Up to 30 snaps/s
Sensitivity – 1.9 V/lux-sec (550nm)
Viewing angle – 55° (H), 39° (V)
Infrared illumination – Yes