CE/FCC/RoHS Approvaled Software Characteristics: * Support DNS register; * Support H.323 V4, MGCP, SIP and IAX2 protocol; * Support DHCP automatic allocation of IP address and other parameters; * Support a variety of NAT passing and firewall passing; * Meet ITU-T standard as well as generation and test of DTMF; * Support G.711A/U, G.723.1 5.3/6.3 and G.729/A/B/AB/GSM610 algorithm of voice coding and decoding; * Support Voice Activity Detection (VAD), Comfort Noise Generation (CHK), Acoustic Echo; Cancellation (AEC) and dynamic voice technology. Its sound can match with traditional telephone. * Support PPPoE protocol (When used on ADSL and Cable Modem connection). * Support many net structures, such as LAN, city Wide Band, special line net, XDSL of Telecom, MODEM, Wide Band and CABLE MODEM Wide Band net of Broadcasting & TV. * Full intelligent manual prompt; * Voice prompt of keyboard operation; * Intellectual fast dialing; * Full duplex Hand-free telephone; * Support real-time volume adjusting; * Volume of headphones and speakers can be adjusted independently. * Calling transfer, calling holding and voice answering; * Internal time-server can indicate standard time of all main time zones; * 108 double-interface telephone can provide two RJ45 standard 100M exchanger interfaces; * Support dialing rule based on E.164 coding; * Can store 100 groups of fast dialing numbers. * Can store 80 received phone numbers, non-received phone numbers and dialed phone numbers respectively. * Can be set through browser (such as IE), Telnet, keyboard and IPPtool software. * Make tailored OEM version according to requirements of the clients. * Tailored setting interface and setting tool; * Automatic port and other parameter configuration, plug and play; * Make homepage link, Chinese and English settings, company logo, etc. * Other requirements of clients