Dsl in this instance stands for Digital subscriber line whereas Adsl stands for Asymetrical digital subscriber line.These terms are normally assigned to internet down a telephone line so I can see why there is confusion.
This has an ethernet wan so would connect to a Adsl modem with ethernet output or a cable router there is no modem integrated to this router
If you want the manual its here
http://www.p4c.philips.com/files/s/s...05_dfu_eng.pdf
PCworld as usual sucks bottoms