... double upstream data rates 3.Built-in 4-port Switch network device adsl2 routerSoftware Specification ADSL FeaturesFull-rate ANSI T1.413 ... , IP, TCP, UDP, ARPNAT, NAPT, DNS, DDNS, DHCP ServerUPnP, Virtual Server, DMZSIP, H323 ALGSecurityStateful Packet Inspection (SPI)NATPacket FilterVPN Pass ThroughIPSec ... : 10%~90% non-condensing Storage Humidity: 5%~90% non-condensing network device adsl2 router