The P-662H-D series is compatible with high-speed ADSL, ADSL2 & ADSL2+ interfaces over existing copper lines. With speeds of up to 12 Mbps (ADSL2) or 24 Mbps (ADSL2+), the P-662H-D series offers higher data transfer rates & better bandwidth than traditional ADSL gateways. It also supports RE ADSL (Reach Extended ADSL) for higher speed & longer distance. The ICSA-compliant Zy NOS operating system ensures state-of-art firewall performance & robust security on the P-662H-D Series. Based on stateful packet inspection, Do S (Denial of Service) & DDo S features, it provides the first line of defense against hackers, network intruders, & other malicious threats. Furthermore, its VPN feature supports data encryption over the Internet to ensure secure data transmission between two sites, & replaces expensive leased lines, allowing global interconnectivity with minimal expense. The P-662H-D Series features a fail-over & fall back WAN backup solution for complete reliability. When the DSL connection fails, traffic is forwarded to either a backup ISDN or analog modem to maintain data transfer. When the DSL connection is re-established, traffic is fully restored. The P-662H-D Series also performs backup functions by redirecting traffic to a specific gateway to ensure availability of the Internet. The WAN backup solution saves device maintenance cost & reduces loss from daily operation. 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.