@Dezinn This could be an issue with the beta FW release since the last stable release doesn't appear to have this problem as you stated.

@IHseeker You should follow device bottom sticker information when selecting the appropriate FW release - details. Here's AX11000(US) v1.0 support page. FW upgrade won't help in case of a faulty WAN...

@rj47 It seems that this XPON terminal is distributed by the ISPs and that's the reason its FW couldn't be found on the support portal.

@9kk If the router is with a customized FW by the ISP is quite possible that the save button has been disabled on purpose. Even resetting the router may not help in this case.

@9kk This router model is usually IPS provided hence your ISP logo on its web manaagement interface. If you can't login the device WebGUI reset to its factory defaults holding the reset button for...

@MarkFd You should probably contact your local support and ask them if they can provide this particular (old) FW release.