Q:What percent penetration should xDSL be expected to achieve in Western Europe?
A: In Western Europe, ADSL can reach around 80% of the current ISDN/POTS subscribers if the downstream bandwidth is limited to 2Mbit/s. With a maximum DS bandwidth (8-9 Mbit/s) the ADSL penetration will be less than 50% mainly due to the long local loop distances and thin copper pairs in the primary twisted pair access network.
The simple plan from an operators perspective will be phase 1 where they deploy as much ADSL equipment as possible within the limitations of their legacy network. When higher penetration and higher bandwidths are required, the operator will initiate phase 2 and deploy next-generation VSDL headend equipment in street side cabinets placed maximum 1.5 km from the Farthest subscriber. This scenario can support up to 12-13 Mbit/s in a symmetric configuration.
(Frank Fabricius, Gartner analyst) Frank's answer continued
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