Cisco Unified Communications 500 Series for Small Business, 8 Users. Management protocols: SNMP, Data link protocols: Ethernet, Fast Ethernet, Switching protocols: Ethernet. Security algorithms supported: LEAP, TKIP, WPA, WPA2, Authentication method: RADIUS, Radio SSID, EAP. Dimensions (WxDxH): 267 x 280 x 67 mm, Weight: 3.6 kg. Power requirements: AC 120/230 V ( 50/60 Hz ). Operating temperature range (T-T): 0 - 40 °C, Operating relative humidity range: 10 - 85 %