Standards and protocols: 1) Supports H323 V4, MGCP, SIP and IAX2 2) DHCP supports LAN or cable modem 3) PPPOE supports ADSL or cable modem 4) Set phone by HTTP web browser (IE 6.0) or Telnet 5) Upgraded by FTP 6) Supports G.711 a / u, G.723.1 5.3 / 6.3, G.729A / B / AB / GSM610 7) Dynamic voice test 8) CNG (comfort noise generation) 9) G.168 / 165 compatible, 16ms echo cancellation 10) Tone generation and local DTMF re-generation according to the ITU-T standards 11) E.164 dial plan and customized dial rules Specifications: 1) Voltage: 7.5 - 9V DC 2) Power: 5.5 - 6.5W (max.) 3) Power adapter: AC / DC input 110 - 240V 4) Network interface: 1RJ 45 Ethernet connectors 5) Telephone interface: 2RJ 11 connectors 6) Product dimensions: 150 x 110 x 28mm Inner packing: Box dimensions: 225 x 170 x 76mm Outer packing: 20pcs/ctn Carton dimensions: 456 x 395 x 362mm Weight: 14kg