The number of devices that can be connected at a given time depends on the resolution of the cameras connected and the network throughput. For 720p resolution 30-40 camera streams can be connected at the same time and if cameras are streaming at 4K at 3-4 Mbps then only 8 to 10 camera streams can be connected through a single gateway, and if cameras are streaming at 1 Mbps then 20-25 cameras can be pushed through. Typically the network throughput is the limiting factor in most installations.