This is a question for tapi/dun/modem sexperts ;-)

cannot get dun to work with aztech mdp3880-w(u) modem.

installed latest drivers, install went fine. "more info" reported info
from the modem.

When I try to dialout using dun i get : "error 633- modem is not
installed or configured for dialup, double click on the modems icon in
control panel"

When I do the above, it tries to reinstall the modem drivers,even though
they have already been installed.

Tried MS's solution and rebuilt telephon.ini, still no go. Also
did their registry fix for telephon.ini

tried uninstalling and reinstalling drivers and modem still no problem.
Modem now assigned to com3 IRQ 10 Everytime I try to dialup win98 wants
me to reinstall the drivers which have already been succesfully
installed. This is probably a problem with the registry, since that is
the cause of so many problems with win98

in my dimension bios, there is a section for all the irqs where u
set it to either available or reserved, but I was told that this is only
for non-plug and pray modems and I got a message from windows saying
this is plug and pray modem. IRQ is currently marked available in bios.