ADTRAN IP SoftPhone User Manual The Settings Dialog61950859L1-1A Copyright © 2006 ADTRAN, Inc. 33.Firewall/NATFigure 5 shows the Firewall/NAT menu for a SIP account configuration. Detailed information on theseconfiguration options is listed below. When the information is complete, select OK to save the settings.Figure 5. Firewall/NAT MenuTable 5. Service Provider InformationEnable this SIP Account Check this box to enable this SIP account.Display Name This is the value that will show on the call display windowof many phones.User Name(Required)This value is assigned to the user by their VoIP serviceprovider or administrator.Password This value is assigned to the user by their VoIP serviceprovider administrator.Authorization User Name May be required by the service provider. The value is oftenblank, or the same as the User Name.Register with Domain Check this box if users must register with their SIP proxy toreceive inbound callsUse as Outbound ProxyCheck this box to use the domain proxy host as anoutbound proxy. Often an outbound proxy is used for callaccounting and may be used to traverse firewalls.SIP Listen Port Set this value to specify the UDP port on which to listen forSIP messages.Clear Button Select this button to clear any information in the currentdialog.