What a difference a few wire crimpings make.
We are scheduled (at some time in the near future, before the End of Time, at least...) to have our home Internet connection upgraded from copper to glass (i.e. Optic Fibre).
We had hoped that the copper, which had been leaking Internet Bits all over the place, would last until the upgrade.
It didn't.
So we rang up the nice people who supplied our Interwebby stuff, and they rang up the NBN* people, who rang up one of their contractors, who came out.
He spent about an hour here, poking, testing, muttering, etc. He eventually re-did three sets of connections (cut the bad ends off, trimmed and re-crimped the wires). And lo and behold, the Internet came back up.
Not only that, but the speed has gone from 70 Mb/s to 90 Mb/s.
Now all I have to do is work out what to do with the great pile of broken Internet Bits that leaked out of the dodgy connection outside the house.
* NBN = National Broadband Network in Aus.