Standalone operation, no computer needed Uses broadband cable/XDSL or network connection for high quality voice over IP Supports Sip, H.323 v4, compatible with most of the H.323 V1-V4 system and equipment Large LCD screen display With Single/double RJ45 broadband socket With H.323 proxy server inside Startup H.245 tunnel quickly Supports H.245 and Q.931 keypad out-band DTMF transferring method Send and receive incoming caller ID with Q.931 protocol Supports calling directly to IP address Supports E.164 telephone number calling when gatekeeper used Search the gatekeeper in LAN automatically Supports calling to PSTN normal telephone with prepaid card issued by ITSP (net2phone, etalk etc.) Supports PPPoE (connect to internet with ADSL and cable modem) User can set the phone with standard web browser(Internet explorer 6.0) or using telnet software Online software upgrade with ftp Supports G.723.15.3k/6.3k G.729, G.711A-Law￠|ì- Law voice encoding and decoding arithmetic Dynamic voice inspection, CNG (Comfort noise generation), Dynamic voice jitter buffer According with G.165 16ms echo counteraction According with ITU-T standard tone (dialing tone, busy tone etc.) and DTMF tone generation and inspection Supports the dialing rule basing on E.164 coding Up to 112 groups of fast dialing numbers 40 groups of incoming and outgoing numbers in memory 16 groups of voice message; volume of handset adjustable; volume of speaker adjustable; voice gu