The P-662HW-D Series features a Fail-over & Fail-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- 662HW-D Series also performs backup functions by redirecting traffic to a specific gateway to ensure availability of the Internet. The WANBackup Solution saves device maintenance cost & reduces loss from daily operation. The Anti-Virus scan engine inside the P- 662HW-D Series provides users with a deeper range of network security. It detects & eliminates virus & worm attacks from the entry points of a network by scanning each incoming & outgoing e-mail (SMTP/POP3), as well as traffic from the Web (HTTP) & File transfer (FTP). Base on automatic signature updates, it provides real time network protection against viruses & protects clients that are not already equipped with Anti-Virus technology