Lan to Dsl - is this possible?

I have a wireless router with dsl line-in support, but right now I have an internet connection over Cable/Lan. Is it possible to convert lan line to dsl, so I could use my router?

Thanks!

Probably best to talk to your ISP, but you can't exactly convert a LAN connection to DSL. DSL is usually delivered over a phone line. If your phone line has DSL and your wireless router has a DSL modem then you could connect them up and it'd work.