4. Technical Parameters
Signaling protocol
SIP (UDP, TCP, TLS)
Buttons
Button design: white-backlit transparent buttons with replaceable nametags
Button count: 1 and increments of 5
Button extenders: up to 29 modules, limited by power supply
Numeric keypad:optional
Audio
Microphone: 2 integrated microphones
Amplifier: 2 x 4 W (class D) amplifier
Speaker: 2 x 4 W / 4 Ω
Sound pressure level : (SPL max) 85 dB (for 1 kHz, distance 1 m)
Output LINE OUT: 1 VRMS / 600 Ω
Volume control :adjustable with automatic adaptive mode
Full Duplex:yes (AEC)
Speech transmission index (STI): 0.89
Audio stream
Protocols: RTP / RTSP / SRTP
Codecs: G.711, G.729, G.722, L16/16kHz
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