Hopefully you'll find any info you need here.
First one. Have a look in your /etc/rc5.d (if you boot into X) or /etc/rc3.d (if you boot into the command line) see if there's a file called SxxPPP or SxxPPoP (I think) if so change it to something elseusing the "mv" command
I don't use dial up myself but I think that should do it (If not someone else will chirp in with the right command)Code:mv S80PPP old.S80PPP
Second have you got XMMS (if you're a windows user think Winamp) installed? Can you play any other sound (like CD audio?) I can't tell wether it's a lack of coddecs or your sound card isn't working. A bit more info and I might be able to help more.
Third check out the PETs (there's a link at the top of the page) these are simple how-to's writen by members of this board, there's a couple of bash ones