zyxel gs1900-88-port desktop gigabit web smart switch: 8x gigabit metal, ipv6, 802.3az (green), easy set up wizard, fanlessreviewzyxel gs1900 series 8/16/24-port gigabit smart managed switch with gigabit speeds and basic management functions provides greater flexibility and connectivity. 1900 series is comprised of four (4) model - gs1900-8, gs1900-8hp, gs1900-16 and gs1900-24e. provision for desktop gbe switches with energy-saving features fanless design and complete support for ipv6 ensure your network to be ready for future expansion. gs1900 series was designed with useful features and advanced settings that ensure speed and safety, as well as quiet operation in office environments.?? 10/100/1000 mbps gbe ports?? easy management via web browser?? quick and easy setup wizard?? advanced network functions and error prevention (loop protection, double images, storm control, dos and ssl)?? without fan?? green ethernet ieee 802.3az supportspecificationsport density10/100/1000 base-t, fixed?? 810/100/1000 base-t, poe, fixed?? -sfp 100/1000 mbps?? -performanceswitching capacity (gbps)?? 16switch forwarding rate (mpps)?? 11.9packet buffer (byte)?? 525 kmac address?? 8 kjumbo frame (byte)?? 9 kpowerinput voltage of ac?? 100-240 v ac, 50/60 hzmax. power consumption (watt)?? 6.5poe power budget (watt)?? -physical specificationsitem dimensions (wxdxh) (mm)?? 250 x 104 x 27item weight (kg)?? 0.65packing dimensions (wxdxh) (mm)?? 302 x 227 x 64packing weight (kg)?? 1.04environmental specificationsoperating temperature?? 0? c to 50? cstorage temperature?? -40? c to 70? coperating humidity?? 10% to 95% (non-condensing)mtbf (hr)?? 862561heat dissipation (btu/hr)?? 22.17