First things first; the T-Hub plugs into your existing analogue landline. It doesn't use Voice-over-IP (VoIP) and to be honest, that's not a bad thing given this is aimed at residential customers. It will also tap in to your existing WiFi network for Internet access. Telstra cite their own services - that is, Telstra fixed line telephone services and Telstra BigPond - as pre-requisites for the T-Hub to work. I am sure you could make the unit work on other networks although with more or less features missing.
The box contains three main components. The first is the T-Hub itself with charging base. Next is a cordless handset again with a charging base. The third item is the base station for the telephone signal which is a fairly non-descript unit save for a flashing blue light. This latter item plugs into your phone line and communicates with both the T-Hub and the cordless handset.
The fact you get a base station gives extra flexibility in where you position the T-Hub in your home. It doesn't have to be near a phone socket at all. So long as it is in range of both the base unit and your WiFi signal it will operate fine.
You can purchase the T-Hub outright for $299 which is what I did. Alternatively, you can pay for it on a repayment plan over two years.
Either way, take it home, open the box and plug it all in and you're on your way.