Basic Features
l Support SIP 2.0 (RFC3261) and correlative RFCs
l Codec：G.711 A/U Law, G.723.1, G.729a/b, G.722,G.722.1, G.726-32
l Echo cancellation: Support G.168, and Hands-free can support 96ms, Hand free Speaker Phone
l Support Voice Gain Setting, VAD, CNG
l Full duplex hands-free speakerphone
l NAT transverse：support STUN client
l SIP support SIP domain, SIP authentication (none, basic, MD5), DNS name of server, Peer to Peer/ IP call
l SIP support 2 SIP lines. Can connect to SIP1 and SIP2 server at the same time
l DTMF：Support SIP info, DTMF Relay, RFC2833
l SIP application: support Call forward/ transfer/ holding/ waiting / paging and intercom/pickup/join call/click to dial/call park/redial and unredial
l Call control features: Flexible dial map, Hotline, Empty calling reject, Black list for reject authenticated call, limit call, No disturb, mute
l 9 distinctive ring tones and 5 music ring tones;10 Memory keys for speed dial
l Support IVR for getting local IP and local number
Network Features
l Support PPPoE for xDSL
l WAN/LAN: Support Bridge and Router model
l Support basic NAT and NAPT（optional）
l Support PPPoE for xDSL
l Support DHCP Client on WAN
l Support DHCP Server on LAN
l Support VLAN (optional: voice vlan/data vlan); QoS with DiffServ
l Support DMZ（optional）and DNS Relay
l Support VPN (L2TP/UDP TUNNEL)（optional）; main DNS and secondary DNS server
l Support SNTP Client and Firewal
l Network tools in telnet server: Including ping, trace route, telnet client
Maintenance and Management
l Web ,telnet and keypad management
l Management with different account right
l Upgrade firmware through POST mode
l Upgrade firmware through HTTP, FTP or TFTP.
l Telnet remote management/Upload/download setting file
l Safe mode provide reliability
l Supoort Auto Provisioning and Syslog
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