Regarding PPP setup on Debian and Sony 505's: First, you may need to set the BIOS Setup option "PnP" off for the modem to work under Linux. (I haven't tried the isapnptools alternative, and doubt it would work.)
Second, the debian package "xisp" is a nice GUI dialer. Nathan Myers [EMAIL PROTECTED] p.s. please reply only to the list, and not to me.