Description: DECT ETSI issued a short-range wireless communications protocol, operating frequency 1.8G-1.9GHz, typical distance for the indoor 50 meters, outdoor 300 meters. The system has the following main functions: 1) the transmission of video: visitors rang the doorbell, the owner can be easily seen through the color LCD rope machine images of visitors, the sub the machine issued BUZZ prompted Ringtones, the owner can be selected by the sub-machine key unlock. LCD 1.8 \ ' 65K color display. 2) the system itself can be used as a color screen cordless phones, Chinese display and input method, Caller ID function 3) cordless call by the sub-machine building management center suitable for the resident unit floor, authorities floor, villas scene
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Spec_DM901_V220_michael.pdf