system scaling is accomplished by stacking up to a maximum of eight units. a full stack of 5530 systems provides 192 copper 10/100/1000base-t ports, 96 1000base-x small form-factor pluggable transceiver ports, and 16 10 gigabit ethernet xfp ports. a full stack of 5510-48t, or 5520-48t systems provides up to 384 ports—352 fixed copper 10/100/1000base-t ports, and 32 switchable copper/sfp ports. stacks can consist of any mix of 5500 series systems.