Telecom have told my client they need a over copper phone line  associated with their fibre. WTF? And sure enough they have made a hash of it.

The idea was simple change ADSL to fibre, keep static IP.

Telecom have installed fibre, and installed a jackpoint with a new phone number thats unused.
Static IP got moved, with some gear rebooting, wasn't a big deal (yay)
Then they disabled ADSL, and the phone line it was on, (fax line, also used for some dial up to bank connections, lol)
But apprently thats ok because the client now have a new line (different #) and telecom have redirected the old number to it.

Well its not ok, because the jackpoint sits unused in the switch panel cabinet, its not conencted to the patch panel, and doesn't go to the various wall outlets through the office.

But more importantly why was it even required to start with?!