<P>You can use the SuperStack II Hub 100 as a stand-alone repeater or as a component in a hub stack. Stacking units provides the benefit of a higher port count with the stack functioning as a single logical repeater. Up to eight units (for example, seven hubs and a Management Unit) can be connected together in a stack. You can create a stack by using the two expansion connectors located on the rear panel to attach more components. Other stackable components include the Hub 100 Management Unit, LinkBuilder FMS 100 TX Hub, and the LinkBuilder FMS 100 Management Unit. The 24-port Hub 100 TX (3C250C-TX-24) has 24 dedicated RJ-45 twisted-pair ports on its front panel. The Hub 100 TX uses 100BASE-TX signaling through 24 front-panel ports. A media-flexible transceiver interface module port on the hub s rear panel provides a twenty-fifth port. </P>