the livecd should also have support for isdn users. this would include: -isdn kernel support -isdn4k-utils (currently depend on x, but there is a new ebuild in bug #9578)
This should be fixed in the "121700" and later experimental livecds. (I'm uploading 122100 now) Give it a whirl -- it should work. Post results (good/bad) here. Thanks :)
*** This bug has been marked as a duplicate of 1996 ***