Products which have video intercom video intercom, security alarm, access control, information dissemination, visitor pictures of a series of patrol management functions.

其中可视对讲产品具备可视对讲、安防报警、门禁管理、信息发布、访客留影、巡更管理等一系列功能。

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The college relies on the network for telephone and intercom services, video surveillance, six school-run cable channels and thermostat control.

FORBES: Wi-Fi With a Coat and Tie