狠狠色婷婷丁香综合久久韩国电影-欧美日韓性视頻在線-色琪琪丁香婷婷综合久久-亚洲欧美成aⅴ人在线观看-国产欧美va欧美va在线

The intelligent building visual intercom system is a new monitoring and security system integrated based on network technology and the three major streaming media technologies of video, voice, and data. This system can achieve functions such as remote calling, watching video surveillance images, and managing access control, and is suitable for various public places, large communities, and high-end office buildings.