Lancom Systems 1821 ISDN Router + ADSL Modem Annex A. DSL connection type: ADSL. Switching protocols: Ethernet, Routing protocols: RIP-1, RIP-2, SAP, VRRP, Data link protocols: Ethernet, Fast Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g. Antenna gain level (max): 3 dBi. Authentication method: SSH, RADIUS, PAP, CHAP, MS-CHAP. Certification: CE, EN 60950, EN50081-1, EN55022, EN55024, EN 300.328