There is (normally) no requirement for any inside wiring.. the DSL service comes over your existing phone signals. Your local Telco does not have to visit your house, saving at least one install visit and one home-sit for you.
At present, Line sharing may still involve one visit from your CLEC to do the installation of the filters
and the configuration of your DSL modem and verification of sync
to the CO. In future, Line sharing is also expected to allow self installation
for those who are willing to follow some technical directions.