Several concurrent drivers emerged during the last few years, stimulat
ing the innovation of the access network. A mix of new services' deman
d, technical opportunities and regulatory changes has completely resha
ped the telecommunication scenario. The paper outlines the rationale o
f the technical choices made by Telecom Italia to develop the full ser
vice network nationwide, The overall architecture description is compl
emented by the analysis of switched digital video services implementat
ion and by the report of the first results of laboratory and field exp
eriences.