RJ-45 10/100/1000 ports 24 1G Combo/SFP uplink ports 0/2 PoE ports 24 802.3af/at ports 24 Switching Capacity 52 Gb/s Operating temperature 0 C to +45 C, 32 F to +113 F Storage temperature -25 C to +70 C, -13 F to +158F Humidity (operating and storage) 5% - 95% Fan (variable speed) 2 fans Acoustic (dB) <40db (A) System Power Consumption (full load) 28.0 W PoE power budget (watts) 192 W