PRS ￣ csrk is a PCB board with the same function as PRS ￣

 CSR remote call station, but it has no shell and other related components. It is mainly used in customized applications. It is connected to PRS ￣ CSI call station interface through Cat-5 cable, which is part of Praesideo optical network. Cat-5 cables are used to transmit digital audio and control data up to 1 km. The length of the Cat-5 cable is not part of the length of the Praesideo fiber optic network. As a result, this greatly increases the total length of the optical network. Prs-csr can be expanded to include up to 16 keyboards (LBB 4432 / 00 or LBB 4434 / 00), each with 8 programmable keys. In addition, it can be extended by using the numeric keyboard (PRS ￣ csnkp). Basic function this call station has a connection for the monitored microphone. The limiter and speech filter improve the definition and prevent the audio clipping. It also has volume controls for monitoring speakers and headphones. When playing music or prerecorded messages, the call station activates the speaker. When the headset is connected, it replaces the microphone and speaker. The call station has its own DSP, which can convert between analog audio and digital audio. Audio processing includes sensitivity adjustment, clipping and parameter equalization. The kit is connected to the prs-csi unit via a Cat-5 cable, which then connects it to the Praesideo fiber optic network. The maximum cable length should not exceed 1 km. The call station receives power from the interface unit via Cat-5 cable, but the call station is also equipped with a local power interface to cope with the extreme cases of long cables and excessive keyboards. Through the serial communication link, the call station can connect up to 16 call station keyboards. The call station will power these keyboards. Users can assign up to 224 priorities to the call station. All configuration can be done through Praesideo network controller. The remote call station is fully monitored and supports fault protection operation. Even if the Praesideo network controller fails, the call station can still connect the emergency call. IEC 6002 for headphone input / output control with headphones The heat dissipation of 55103-2 standard conforms to en 55103-1 / fcc-47 part 15b

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