The Ajax hub is the intelligent control panel of the Ajax security system, functioning as a central brain that monitors connected devices, like sensors and detectors, using secure Jeweller radio technology. It features multiple communication channels, such as Ethernet and cellular, to send real-time alarm notifications to users and security companies via the mobile app. The Hub provides a backup battery, over-the-air operating system updates, and is controllable through mobile and desktop applications, rather than a traditional keypad.