ZyXEL P-2602R-D1A ADSL2+ VoIP IAD over POTS. Management protocols: SNMP v1 & v2c, HTTP/HTTPS/TFTP, Routing protocols: DHCP, UPnP. VPN support: IPSec, PPTP, & L2TP. Dimensions (WxDxH): 43 x 124 x 181 mm, Weight: 0.342 kg. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 20 - 85 %