@briangr Are other client devices connecting to the internet fine? How about the internet LED on the AX55? If that is orange, you need to check the internet settings on it as follows: What should I...

@lawks It should be backward compatible with 1G SFP Module connectivity, but no public information can be found now.

@ba93743d-3bbd-4 There must be an issue with the hardware. Contact the local tech support to be advised further.

@Racerke Since you are replacing the old Archer C5 with the new AXE75, and they are different hardware, you will need to configure the new AXE75 from scratch, you cannot copy the settings on the C5...

@7891920601jbs Which password are you referring to? This WR850N seems to be a model that targets to local internet providers, there is a possibility that you are not allowed to change the management...

@labor222 These models seem to be customized versions for the local providers. Are you an end-user or a provider? I guess you will need to contact the local tech support for advice.