webwat: Wow you arent allowed into your own house until handover?
Well you could ask them to leave all the cables coming out of the wall so you can put up your own cabinet later with patch panel and modem etc. Just make sure you specify at least 1 or 2 metres of spare cable left hanging out of the wall. You could always deliver your hardware to the company so their electrician can mount it on the wall for you.
I recon its a good option to use RJ11 jacks for the phone, so you never need to wonder which is data and phone. Keystone jacks are really common but the clipsal ones look nice and can be mounted horizontally...
Remember TV might need an ethernet jack in future too, depending on who wins the FTTP contract in your area. So will eventually need access for another cable to be run in to replace the phone line.