The ProCurve Switch zl Modules are components that you can add to a ProCurve zl switch to provide a variety of network connectivity options.

24 twisted-pair ports with RJ-45 connectors for 10/100/1000 Mbps (Gigabit) or 100 Mbps operation over Category 5 or better 100-ohm UTP or STP cable (category 5e recommended for Gigabit) -- all ports have the IEEE 802.3ab Auto MDI/MDI-X (HP Auto-MDIX) feature and support IEEE 802.3af PoE.

– auto-enabled ports - the ports are all configured to be ready for network operation as soon as a viable network cable is connected
– auto-configuration - a default configuration is applied to the module when the switch is powered on and the module passes self test; this default
configuration works well for most network installations
– LEDs that provide information for each port on the link status, network activity, connection bandwidth (speed), communication mode (half or full duplex), presence of specific network error packets on the port, and PoE state and configuration.
– "hot swap modules" operation - 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)
– "hot swap mini-GBICs" operation - you can add, replace, or change the type of any of the mini-GBICs that you use in the Gig-T + 4 port mGBIC Module, without having to first remove the module, and without having
to shut down the switch
– the RJ-45 ports on all modules have the HP Auto-MDIX and the IEEE 802.3ab Auto MDI/MDI-X feature. These features operate the same way and allow you to use either straight-through or crossover twisted-pair
cables for all the twisted-pair network connections.
– all RJ-45 twisted-pair ports support Power over Ethernet (PoE) technology