SIP ConfigField name explanationSIP LineChoose line to set info about SIP, there are 4 lines to choose. You can switchby【Load】button.Basic SettingsStatus Shows if the phone has been registered the SIPserver or not; or so, show Unapplied.Server Address Input your SIP server address.Server Port Set your SIP server port.Authentication User Input your SIP register account name.AuthenticationPasswordInput your SIP register password.SIP User Input the phone number assigned by your VoIPservice provider. Phone will not register if there isno phone number configured.Display Name Set the display name.Proxy Server AddressSet proxy server IP address (Usually, Register SIPServer configuration is the same as Proxy SIPServer. But if your VoIP service provider givesdifferent configurations between Register SIP Serverand Proxy SIP Server, you need make differentsettings).Proxy Server Port Set your Proxy SIP server port.Proxy User Input your Proxy SIP server account.Proxy Password Input your Proxy SIP server password.Domain RealmSet the sip domain if needed, otherwise this VoIPphone will use the Register server address as sipdomain automatically. (Usually it is same withregistered server and proxy server IP address).Backup ServerAddressInput the Backup Server Address, if the primaryserver is unavailable, then the phone will enable theBackup Server Address.Backup Server Port Specify the Backup Server Port.Enable Registration Start to register or not by selecting it or not.Codecs SettingsDisableCodecs/EnableCodecsUse the navigation keys to highlight the desired onein the Enable/Disable Codecs list, and press thedesired to move to the other list.Advanced SIPSetting