Applications•SOHO•Small Businesses•Medium Businesses•Multiple SiteFeatures•50 Extensions•Video Calls•Multiple Language•DID(Direct Inward Dialing Number)•Support SKYPE for SIP•Call Monitor / Record•FXO to FXS life line•Codec: G.711-Ulaw,G.711-Alaw,G.726,G.729,GSM,SPEEX,H.261,H.263,H.263+,H.264•Call Hold / Forward / Transfer / Waiting / Parking•Call Paging and Intercom•Caller ID•Music On Hold•DISA(Direct Inward System Access)•Flexible Dial Plan•Ring Group•Conference Room•Black List•Phone Book•Call Queue•BLF(Busy Lamp Field)•Built-in SIP/IAX2 server•Build-in voice mail server•Echo Cancellation/VAD•Configuration By web•Configuration by SSH•Support Static/DHCP/PPPOE•VPN Server/Client•DDNS(Dyndns.org /No-ip.com /zoneedit.com)•Support NTP(Network Time Protocol)•Auto-provisioning