The HP Switch Modules are components that you can add to an HP Switch to provide a variety of network connectivity options. The HP Switch Modules ports are all configured to be ready for network operation as soon as a viable network cable is connected. Default configuration is applied to the module when the switch is powered on & the module passes self test; this default configuration works well for most network installations. LEDs provide information on the link status, network activity, connection bandwidth, & communication mode (half or full duplex). " Hot swap" operation is supported, so you can add a module or replace a module without having to shut down the switch (changing the module type in a given slot does require a switch reset).