Lancom Systems 1723 VoIP, annex B (ADSL over ISDN). VPN support: -tunnels: 5x IPSec 25x -IKE -X.509 -RAS user -6 / 24 Mbps. Indoor range: 30 m, Outdoor range: 150 m. Dimensions (WxDxH): 210 x 140 x 45 mm. Power requirements: 12 V DC,(230 V). Operating temperature range (T-T): 5 - 40 °C, Operating relative humidity range: 0 - 80 %