S5720-28X-SI-24S-AC Huawei Network Switch 24 Gig SFP,8x10/100/1000 or SFP,4x10 Gig SFP+ Overview S5720-28X-SI-24S-AC - Huawei S5700 Series Switches.S5720-28X-SI-24S-AC(24 Gig SFP,8 of which are dual-purpose 10/100/1000 or SFP,4 10 Gig SFP+,AC 110/220V,front access) Specification Memory (RAM) 512 MB Flash 240 MB Mean time between failures (MTBF) 41 years Mean time to repair (MTTR) 2 hours Availability gt, 0.99999 Service port surge protection Common mode: plusmn,6 kV Power supply surge protection plusmn,6 kV in differential mode, plusmn,6 kV in common mode Dimensions (W x D x H) 442.0 mm x 220.0 mm x 43.6 mm (17.4 in. x 8.7 in. x 1.72 in.) Weight (including packaging materials) 3.2 kg (7.06 lb) Stack ports GE SFP optical ports except combo ports and 10GE SFP+ optical ports RTC Supported RPS Supported PoE Not supported Rated voltage range 100 V AC to 240 V AC, 50/60 Hz Maximum voltage range 90 V AC to 264 V AC, 47 Hz to 63 Hz Maximum power consumption (100% throughput, full speed of fans) 41.7 W Typical power consumption (30% of traffic load) Tested according to ATIS standard EEE enabled No PoE power consumption 28.9 W Storage temperature -40C to +70C (-40F to +158F) Noise under normal temperature (27C, sound power) less than 43 dBA Relative humidity 5% to 95%, noncondensing Operating altitude 0-5000 m (0-16404 ft.)