Support protocol
SIP(RFC3261, RFC3262, RFC3265)
Support IAX2.
Support. T38/G711 Fax.
Voice Codec: G. 711A/u, G. 729 A/B
G. 168 echo cancellation standard, compliant 96ms echo cancellation with speaker mode
Jitter Buffer, VAD, SIP/IAX2, Domain name register, point-to-point Call
SRV mode: Can auto-swap between main and backup server
RTP and RTCP
Support the Inbound/Outbound transmission; SIP info, DTMF Relay, RFC2833
Standard ring for many countries
NAT transversal: Support STUN, CITRON, AVS Mode
Support SIP domain, SIP Authentication(none, basic, MD5), Domain Name parse
Support two SIP server synchronously, including Pubic Server/ Private server, can make a call by either proxy
Support redundancy public server, can auto swap to backup server when there is some trouble with main server.
Support SIP application, including SIP Call forward/transfer/holding/waiting.
Network Features
Support two models: Bridge and Router, integrate two ports router function.
Support basic NAT and NAPT.
Support PPPoE for xDSL, and support to dial numbers automatically while hanging up phone.
Support DHCP Client for WAN.
Support DHCP server for LAN.
Support DNS relay for LAN, can provide DNS service for LAN Network equipment
Use advanced DSP technology to insure high quality voice.
Use advanced jitter buffer tech to prevent the delaying and losing for info package.
Support Network Tools, including ping, race route, telnet client.
Support three modes to configure IP on the WAN port, they are: Static, DHCP, and PPPoE.
Provide the small LAN to control firewall.
Provide the small LAN with optional priority level.
Support Second Layer QoS (802.1) 1
Advanced Functions
It can register to two SIP server synchronously and a PSTN number, it has 2 VOIP number and 1 PSTN number, that means one phone has 3 numbers.
Call waiting, call transfer, 3 ways call, multiple call forward.
Switch freely between VOIP and PSTN.
Call in displays, call out bans; No-disturb setting, auto answer, auto dial while hanging up, quick dial.
Setting black namelist and limited number.
Support point-to-point call.
Setting the method for ending number.
Setting the method for the fixed call.
Support Silence Suppression, VAD(Voice Act