Hello, friend!
If you cannot find the WAN Configuration tab after logging in to the WebUI of the device, the following situations may occur:
1. The account you log in to is a common user account and password. To configure the HG8546M, you need to use the administrator account and password to log in to the HG8546M. As the HG8546M is an ISP series device, you need to obtain the administrator account and password from your device provider or ISP.
2. Your device is a customized version of the ISP, and this configuration is not disclosed to users. In this case, you need to seek a solution from your device provider.
Thanks!