Very-high digital subscriber line (VDSL2+) is a newer technology that utilizes the same copper line as ADSL2+ with excessive speed and greater capacity.
Though, your highest speed depends on your profile band plan. This will be either 8b (50Mbts max) or 17a (70Mbts max). Normally Chorus do not physically change your Band plan profile and the only way to get to a 17a profile is if DLM determines that it is suitable to do so. As reported in Chorus VDSL credentials, line attenuation must be fewer than 2.75db (in other words; you are less than approximately 200m from the cabinet) for 17a to be activated.
It basically exploits the current structure of copper lines that were originally deployed for traditional telephone service (POTS) as a way of supplying very high speed broadband. It joints the main high-speed link (e.g. a fibre optic, HSNS Circuit connection) terminates at a core close to the customer’s location. Then it utilizes the active copper wires infrastructure to deliver the high speed connection for the remaining short distance to the customer’s locations. It also can be deployed from main offices, from fiber-optic connected cabinets located near the customer premises, or within buildings.