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Support two models: Bridge and Router(NAT&NAPT). Network Protocols: TCP/UDP/IP, ICMP, HTTP, DHCP Client (WAN Interface), DHCP Server(LAN Interface), DNS Client, DNS Relay, SNTP, PPPoE, FTP, TFTP.
VoIP Protocols: SIP (RFC3261, RFC3262, RFC3264, RFC3265)
Voice Codecs: G.711(A-law/U-law), G.723.1, G.729A/B,
NAT penetration: Support STUN client,
Support modify SIP register port, HTTP server port, Telnet server port and RTP port.
Support two SIP server synchronously: Can register two different SIP server, and can make a call by either proxy.
Support standard voice features such as numeric Caller ID Display, CDo-Not-disturb, Forward, ban outgoing.
Support standard encryption and authentication
