Standard and Protocol: Support H323 V4 ,MGCP,SIP DHCP support for LAN or Cable modem PPPOE support for ADSL or Cable modem Set phone by HTTP web browser(IE6.0) or Telnet Upgrade by FTP Support G.711 a/u ,G.723.1 5.3/6.3, G.729A/B/AB/ gsm610 Dynamic voice test CNG(Comfort noise generation) G.168/165 compliant 16ms echo cancellation Tone generation and local DTMF re-generation according with ITU-T E.164 dial plan and customized dial rules. Electric requirements Voltage: 7.5V-9V DC Power: 5.5W-6.5W (max.) Power adapter:AC/DC input110-240V Network intrface:1rj45 Ethernet connectors. telephone intrface:2rj11 connectors. Size 150 x110 x28 mm (L xW xH)