"3DON-20-05" is the nbn designated code for this particular area.
DPU - Distribution Point Unit
O28 - Distribution Pair
P2 - Pillar the distribution Pair is fed from
This P2 O28 is so the lineys know what pair they're working on in case they need to do any work (either nbn/Telstra etc) before or during the FTTC install for this property.
The DPU has been installed, but there's no fibre yet. Eventually there should be a green fibre connected to it- and this box acts like a mini DSLAM or node if you will for you and a couple other neighbours. The phone line to your house gets connected to this DPU, then the magic happens turnbull intensifies
https://www.nbnco.com.au/blog/the-nbn-project/what-is-fttc-our-latest-network-technology