Designed for improved serviceability and quick replacement of units, the rack holds up to 3 interchangeable and hot-swappable blades. There is no need to power down when installing or changing blades. The Axis video server rack combines high reliability and functionality with quick, flexible and professional installation.The Axis video server rack solution offers improved serviceability and trouble-free unit replacement or expansion - simply add more blades. The rack provides serial communication and I/O connectors at the rear of each slot, and a single network connection together with integrated power for simple installation. There is no need to power down when installing or changing blades. AXIS 291 1U combines high reliability and functionality with quick, flexible and professional installation.AXIS 291 1U is designed for applications that need to be able to expand, not only by adding more channels, but also by using different types of cameras. It is ideal for airports, hotels and train stations or other premises where analog cameras are already installed.