Motion detect video record, image missing alarm;

支持移动侦测录像，报警录像，定时录像；

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It has high identified ability and can decrease the rate of false or missing alarm signedly. Compared to normal system this system can alarm earlier for about 5 minutes.

实验证明，系统能够很好的实现火灾的早期报警，具有高辨识力，大大降低了火灾报警的误报与漏报率，较普通报警系统提前5 分钟。

youdao

Quicker transfer speed and much more network flux result in the appearance of bottle-neck when the original data is centralized to deal with, which leads to missing alarm.

网络速度传输加快，网络的流量也越来越大，集中处理原始数据的方式往往造成检测瓶颈，导致漏报。

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The second man raised the alarm for the missing 41-year-old, who had moved to Blackpool from Barrow in Cumbria.

BBC: Paul Morris

After Sierra's family raised the alarm that she was missing, some of her belongings -- including her passport and medical cards -- were found in her room in Istanbul, though her iPhone and iPad were not there, according to her husband.

CNN: Body of missing NY mother found in Turkey