Analog Telephone Adapter,web phone

1. Built-in Modem or without built-in Modem function 2. Following H.323 version 4 standard/RFC-3261SIP standard 3.Support G.723.1(6.3k/5.3k), G.729A/B, G.711(A- law/U-law) voice codecs. 4. Support H.323,/RFC3261, TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP, DNS, DHCP, NTP/SNTP, FTP, STUN, PPPoE protocols. 5. Passing through NAT devices. 6. Remote software upgrade capability.(via ftp)

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