A list of DSL ports available (ADSL capacity) is located here..as well as lots of other intersecting stuff:
http://telstrawholesale.com/products...orts-plans.htm
It is updated regularly by Telstra but this list is not widely circulated & known to the public.
Other obstacles are:...for example in my Estate we are on a RIM & I had to canvass for years to get Telstra to upgrade it to DSL capable (unfortunately not all RIMs can be upgraded).
The RIM has about 72 DSL available ports (in an estate of 300+ houses) which quickly went & there is a waiting list for ports.
Situations like this are outlandish given the amount amount of public ownership of Telstra in past decades & their monopoly in Australia.