... can double upstream data rates 3.Built-in 4-port Switch 4 port adsl2/2+ routerSoftware Specification ADSL FeaturesFull-rate ANSI ... UDP, ARPNAT, NAPT, DNS, DDNS, DHCP ServerUPnP, Virtual Server, DMZSIP, H323 ALGSecurityStateful Packet Inspection (SPI)NATPacket FilterVPN Pass ThroughIPSec ... Hardware SpecificationPorts4 10/100M LAN ports(RJ45 )1 Line port(RJ11)LED IndicatorsPower, ADSL, ACT, USB, LAN1~ ...