D-Link Wireless (802.11n) Gigabit Router VoIP. Networking standards: 802.11g, IEEE 802.11b. Supported network protocols: Static IP, PPPoE, PPTP, L2TP, VoIP protocols: SIPv2. Security algorithms supported: 64/128-bit WEP, WPS, VPN support: IPSec, PPTP, L2TP. Input current: 2.1 A. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 65 °C, Operating relative humidity range: 10 - 90 %