Lancom Systems 821+. DSL connection type: ADSL. Switching protocols: Ethernet, Routing protocols: RIP-1, RIP-2, Data link protocols: Ethernet, Fast Ethernet. Authentication method: RADIUS, PAP, CHAP, MS-CHAP. Certification: CE, EN 60950, EN55022, EN55024. Operating temperature range (T-T): 5 - 40 °C, Operating relative humidity range: 0 - 80 %