role of a MODEM in the mordern WAN/internet

Is it that you must have a modem to communicate via WAN and Internet, how about wirless wan communications or the metroethernet

modems convert analog signals to digital signal , do we still need them these days.

I am working on File tranfer over WAN links without a modem

thanks

Sose,

I am not sure whether we can completely replace the modems. What I think that until and unless we have the analog telephone lines, we need the modems (or converters) to use the internet.

Let me know if any one disagree with me.

Regards
Next_virus