Hi, Not sure if this is the right place, but...

I have two sets of parents, mine + inlaws, swapping from legacy xnet plans to Telecoms new $75 and $85 broadband plus home line plans.  Presently they have both made their phone calls to Telecom to sign up for their deal (both were with Telecom for their landline component anyway).

I'm just wondering what the steps are behind the scenes to achieve this?

As in, are there any wiring changes required in the field? 
When do they contact xnet to advise them their services are no longer required?
How long are they likely to be without a broadband connection etc?

All that sort of stuff.