The P-661H-D series is capable of supporting high-speed ADSL, ADSL2 & ADSL2+ over existing copper lines. With speeds of up to 12 Mbps (ADSL2) or 24 Mbps (ADSL2+), the P-661H-D series offers higher data transfer rates & better bandwidth than traditional ADSL enabled gateways. The P-661H-D series also support RE ADSL (Reach Extended ADSL) for better performance at greater distance. The P-661H-D series offers the key link between today's communications services & tomorrow's converged services. The ICSA-certified Zy NOS operating system ensures state-of-art firewall performance & robust security from the P-661H-D series. Based on Stateful Packet Inspection, Do S (Denial of Service) & DDo S features, it provides the first line defense against hackers, network intruders, & other harmful threats. Furthermore, its VPN feature supports data encryption over the Internet to ensure secure data transmission between two sites, & can be used to replace a private leased line, allowing global interconnectivity with minimal expense. Through its interactive multimedia interface, Zy XEL Multimedia Auto Provisioner Express (MAP Express) offers comprehensive instructions for even non-technical users to follow step by step to easily install & configure the device with simple mouse clicks. With the interactive installation tutorial, users can change the speed of the presentation using the control. The embedded Trend Micro Home Network Security Service (TMSS) feature not only helps to identify the vulnerabilities & security holes on PCs, but also protects both the network & the PCs within from virus & hacker attacks. Please note: networking components such as switches, routers & wireless devices require that speeds & standards be consistent throughout the network to gain optimum performance. To avoid compatibility clashes or for advice, please contact us on solutions@ebuyer.com.