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Basic call stations can broadcast manual or pre-recorded broadcasts to any pre-specified area. The basic call station is equipped with a microphone (with a flexible, flexible microphone handle), a push button, a speaker, and a headset jack. LBB 4430/00 can be extended to include up to 16 keyboards (LBB 4432/00 or LBB 4434/00), each with eight programmable keys. You can also use PRS?CSNKP as an extension. The basic function call station is equipped with a monitored gooseneck and heart-shaped directional microphone with excellent voice resolution. The converters and voice filters improve clarity and prevent audio clipping. It also comes with a volume control for monitoring speakers and headphones. The call station activates the speaker when playing music or prerecording information. When connected to the headset, it replaces the microphone and speakers. The call station has its own DSP and can convert between analog and digital audio. Audio processing includes sensitivity adjustment, amplitude limiting and parameter balancing. Through a serial communication link, a call station can connect up to 16 call station keypads. The call station will power these keyboards. Users can assign up to 224 priority levels to call stations. All configurations can be completed by the Praesideo network controller. The call station is fully monitored and fail-safe operation is supported. Even if the Praesideo network controller fails, the call station can still make emergency calls. Control components and light, 3 LED status indicators, configurable "press the button", the speaker/headset volume control interconnection, the two systems network connection, used in the serial data and supply to the calling station keyboard, 3.5 mm headphone jack certificates and recognized safety conforms to the standard IEC 60065 / EN 60065 immunity in accordance with EN 55103 ? 2 / EN 50130 / EN 50121 ? ? 4 standard cooling conform to EN 55103-1/4 FCC - 47 Part 15B of the standard urgently meets EN 60849/EN 54-16 /ISO 7240-16 maritime compliance IEC 60945 regional certification European CPR EU_CPR CE