... is not only inherits tradition of quality voice communication over IP network but reduce the human resource of VoIP network deployment ... port registration •By device registration(share account) •Support IP trunk and IP trunk group •Two 183 mode •Response code switch •All ... RJ45 •Manage Interface: 1 Console RFC2833 •Static IP, PPPoE, DHCP •Network Protocol Support: •IP,TCP, UDP,TFTP, FTP, RTP, RTCP, ...