... -time, toll-quality voice over the Internet. Developed with ADSL2/2+ broadband technology over PSTN, the A800-b ... VoIP and Router integratedIntegrated 802.11g AP, backward compatible with 802.11bSupports life line: PSTN alive when power offSupports ... Configuration backup and restorationSoftware upgrade via HTTP, TFTP client and server, or FTP server,SNMPRouting FunctionsStatic route, RIP, and RIP v1, ...