Cisco Unified Communications 500 Series for Small Business UC520. Management protocols: SNMP, Supported network protocols: H.323, SCCP, SIP, Data link protocols: Ethernet, Fast Ethernet, IEEE 802.11b, IEEE 802.11g. Security algorithms supported: LEAP, TKIP, WPA, WPA2, Authentication method: RADIUS, Radio SSID, EAP. Cabling technology: 10Base-T/100Base-TX. Dimensions (WxDxH): 267 x 280 x 67 mm, Weight: 3.6 kg. Power requirements: AC 120/230 V ( 50/60 Hz )