Zyxel ADSL Prestige 660HW-61, ADSL Zyxel ADSL Prestige 660HW-61. Networking standards: IEEE 802.11b, IEEE 802.11g, IEEE 802.1D, IEEE 802.1x. Authentication method: RADIUS. Routing protocols: RIP-1, RIP-2, Management protocols: SNMP, Telnet, HTTP, Supported network protocols: TCP/IP, UDP/IP, ICMP/IP, IPSec, PPPoE, PPPoA, AAL5. Antenna gain level (max): 2 dBi. Weight: 325 g