Having just (at last) learned that my local cabinet has expanded its fibre capacity I upgraded and received a Hub One router/modem from Plusnet. This works fine, but as a back-up I decided to buy a second-hand ex PostOffice branded modem for line troubleshooting purposes.
This is a Zyxel VMG 3925-B10B unit which appears functional, the DSL light goes green after taking a minute or so to lock to the VDSL signal, but it doesn’t connect to the internet. I assume this is because I’ve failed to set it up correctly.
The obvious things (Plusnet login and password) should be right, but there is a pile of settings in the WAN config section that are hidden from view on the Hub One so I can’t use that as a reference and trawling the community forum hasn’t revealed my mistake either.
Fixed! Go to the fix.