I'm not exactly sure the exact type of DSL, but this is the list of compatible modems they gave me.
3Com HomeConnect PCI Card (3ec3617-bso (Akita), 3cp3617b-bso (Seadra), Driver 2.0)
Alcatel A1000 (3ec18202ad)
Alcatel SpeedTouch Home (3ec18204bc, 3ec18804bc)
Alcatel SpeedTouch USB (3ec18607cd, Driver 1.2.3, Driver 1.3.1)
Efficient Networks 3060 (110-3060-701, 110-3060-001, 110-3060-002)
Efficient Networks 4060 (140-4060-501, 161-1008-001, 110-4060-002, 110-4060-001, 140-4060-701)
And they did send me a modem. UPS fricked up my delivery and now my modem is lost in Bangcock somewhere and Bellsouth doesn't want to send me another and Ups is saying I got my modem. Figure that one out.