Well, I've got it working.

The problem was a combination of my low boredom threshold and what I would call a misleading error message.

Booting the router is a three-step process whereby first the access box is powered on, secondly the router is powered on, and thirdly the computer is powered on. Each step requires what feels like an immense amount of time.

It is my hypothesis that originally I either didn't follow the sequence or didn't wait long enough for one or more of the stages of the process to complete. Either that or the imp of the perverse is toying with me.

I've run through the process twice and both times everything works fine (although I've noticed an increase in timeouts, perhaps just coincidental, and slower downloads of small amounts of data, 16k can take seconds but I suppose it is probably just congestion of some sort somewhere out there).

So impatience and an error message that sent me looking in the wrong direction for the solution seem to have been the problem. (Yeah, it was operator error).

Thanks to all for the support and encouragement as I explored various blind alleys on my way to the mundane solution.

Django