🚀 go-pugleaf

Thanks to those who replied.
I've got it sorted out now, and thought I should share my experience
with you.

The V.34 upgrade software is available on the USR BBS (in the UK)
at 0753-818992
It is in the UPGRADES area of the file-system, and the file is
SDL_766A.ZIP

This is an IBM PC zipped executable, so if you're on an Amiga (like me)
you'll need PC-Task or similar (or a friend with a PC) to run it.

When I ran it, it went all the way through the upgrade procedure, but
hung up whilst waiting for the modem to reset. I rang USR and was
told to power-cycle the modem, which I did. Then you need to flip the
DIP-Switch #10 to make it read from a ROM template when powering up.
I did this, then AT&W to reset the NVRAM (which I think got corrupted),
reset the DIP switch again and all was well.

Hope this helps anyone in distress.

--
                    | Pope Adrian IV of the Church of The Holy Lungfish,
 __ __/__ . __ __   | Larry the Thrice-blessed.
(_/(_//  / (_// /   | "Call on God, but row _away_ from the rocks."