DECT是ETSI颁布的一种近距离无线通信协议，工作频率在1.8G-1.9GHz,典型距离为室内50米，室外300米。

本系统有以下主要功能：

1）传输视频：访客按门铃时，主人可以很方便地通过无绳子机的彩屏LCD看到访客图像，子机发出叮咚提示铃声，主人可通过子机按键选择开锁。LCD为1.8\ 65K色彩屏。

2)系统本身可作为彩屏无绳电话使用，有中文显示及输入法，来电显示等功能

3）可无绳通过子机与楼宇管理中心通话

适合居民单元楼，机关楼，别墅等场景使用

-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