... Online:Support TFTP upgradeDisplay:LCD display,display 16 Telephone Number, Clock, back lightCase:12 Dialing Keyback light ... restrain and comfort noise generation.Agility AccessSupport IP special telephone line, ADSL LAN Cable Modem;HIP1860(3) double Ethernet ... model support NAT function,realize users internet connection;Telephone function: Hand free talking, Volume adjusting, Ringing tone ...