20Administrator Guide – AzaCall200 VOIP Multi-Protocol Gateway5.5. WAN Configuration5.5.1. WAN IPUser can decide on the method of obtaining the WAN IP address for the VOIP gateway device byselecting one of the three choices listed in the WAN IP Configuration window. After the newconfiguration is saved and the device rebooted, the setting changes made by the user will takeeffect.As shown in the figure below, there are three methods for the gateway device to obtain an IPaddress. These are the Static IP address, DHCP (default settings), and PPPoE. If the user selects the static IP address item, please be sure to configure all the IP addressrelated parameters on screen.NoteThe static IP address, address mask, and other related information may beobtained from the Internet Service Provider. If the user selects DHCP, there are no other parameters to fill in the values in thisconfiguration window. When the gateway device has been dynamically configured by theService Provider’s DHCP server, the user may also observe the device’s current IP addressand other related information by entering the DHCPC Status menu (refer to an earlier sectionin this chapter on DHCPC Status). If the user selects PPPoE, please also go to the PPPoE configuration menu (refer to an earliersection in this chapter on PPPoE Configuration) to configure the username and password forauthentication by the ISP. After rebooting the device and gaining access to the Internet or theservice network, the user may observe the device’s current IP address and other relatedinformation by entering the PPPoE Status menu (refer to an earlier section on PPPoE Status).NoteThe PPPoE configuration information may be obtained from the InternetService Provider.All of the new or changed settings will take effect after the user reboots the gateway device, soplease remember to click on the “OK” button in this configuration menu first, and then “SaveConfiguration” and “Reboot” so that the new settings may take effect.The figure below shows that “DHCP” mode is selected as the Internet access protocol for ourVOIP gateway device.