How will I know if I can get iPrimus Naked DSL?
You can perform a preliminary check online or contact our sales team on 131 789. They will run through a line qualification check for you, and inform you whether the service is available.
from wiki
In naked DSL, there is no cable from the telephone switch to the POTS splitter. Thus there is no dial tone on the line. However, the customer could still use the line for regular telephone service through Voice over Internet Protocol (VoIP) or a Competitive Local Exchange Carrier (CLEC) instead of the Incumbent Local Exchange Carrier (ILEC).