Quoting Dan Williams <dcbw redhat com>:
I may have been unclear :) We haven't written PPP/ISDN off at all, just decided that there's no possible way to make it "automatic" as with wired & 802.11 networks. Therefore, its going to be more of a manual operation to connect, most likely, as with non-carrier-detecting Ethernet cards.
:) That's good enough for me :) (Actually, late last night, well after I sent this message, I re-read what you wrote and other replies and realized I probably misread what you wrote)
Dan
-derek