SIP electronic unit for audio video entrance panel, colour camera and wide-angle lens, automatic lighting adjustment of the field of View, echo canceller, automatic sound balancing, automatic loudspeaker level control, automatic microphone level control, teleloop for hearing aids, 4 call buttons with white LED backlighting and dusk/dawn lighting control, call status indicator LED, 1 output for direct release of electrical lock connected to terminals S+ and S-, 1 programmable input for connecting a push button for lock release mechanism connected to terminals CA+ and CA-, or for a door status sensor, to be completed with audio/video front cover and single button, double button or blank module, PoE power supply
