VoIP

• Support SIP 2.0 (RFC3261) and correlative RFCs
• Full duplex hands-free speakerphone
• NAT transverse：support STUN client
• SIP support SIP domain, SIP authentication (none, basic, MD5), DNS name of server, Peer to Peer/ IP call
• SIP support 2 SIP lines. Can connect to SIP1 and SIP2 server at the same time
• DTMF：Support SIP info, DTMF Relay, RFC2833
• SIP application: support Call forward/ transfer/ holding/ waiting / 3 way talking/ paging and intercom/pickup/join call/click to dial/call park
• Call control features: Flexible dial map, Hotline, Empty calling reject, Black list for reject authenticated call, limit call, No disturb, Caller ID
• Support Phonebook 500 records
• Incoming calls / Outgoing calls / Missing calls. Each support 100 records
• Support conference and voice record on SIP server
• 10 kind of ring type
• Support SRTP
• Support MWI
• Redundancy sip server capable.
• Hotline.
• Call Forward、Call transfer、Call hold、Call waiting, 3-way Talking、Pickup、Join call、Redial、Unredial、
• Call Park、vport、click to dial
• DND(Do Not Disturb),
• Black List,Limit List
• E.164 dial plan and customized dial rules

Voice

• Codec：G.711 A/U Law, G.723.1, G.729a/b, G.722,G.722.1,
• Echo cancellation: Support G.168, and Hands-free can support 96ms, Hand free Speaker Phone
• Support Voice Gain Setting, VAD, CNG
• Tone generation and Local DTMF re-generation according with ITU-T
• AGC(Auto Gain Control)
• AEC(Auto Echo Cancellation)
• VAD (Voice Activity Detection)
• CNG(Comfort Noise Generation

Networking

• WAN/LAN: Support Bridge and Router model（optional）
• Support basic NAT and NAPT（optional）
• Support PPPoE for xDSL
• Support DHCP Client on WAN
• Support DHCP Server on LAN（optional）
• Support VLAN (optional: voice vlan/data vlan)
• QoS with DiffServ
• Support DMZ（optional）
• Support VPN (L2TP/UDP TUNNEL)（optional）
• Support main DNS and secondary DNS server
• Support DNS Relay（optional）
• Support SNTP Client, Firewall
• Network tools in telnet server: Including ping, trace route, telnet client
• PoE

Protocols

• MAC Address
• TCP:Transmission Control Protocol
• DHCP:Dynamic Host Configuration Protocol
• PPPoE:PPP Protocol over Ethernet
• PoE(option)
• SNTP, Simple Network Time Protocol
• STUN - Simple Traversal of User Datagram ...
• MD5 Message-Digest Algorithm
• DNS: Domain Name Server
• RTP: Real-time Transport Protocol
• RTCP:Real-time Control Protocol
• Telnet:Internet''s remote login protocol
• HTTP:Hyper Text Transfer protocol
• FTP:File Transfer protocol
• TFTP:Trivial File Transfer Protocol

Management

• Web ,telnet and keypad management
• Management with different account right
• Upgrade firmware through POST mode
• Upgrade firmware through HTTP, FTP or TFTP.
• Telnet remote management/Upload/download setting file
• Safe mode provide reliability
• Support Auto Provisioning （configuration file)
• Support Syslog