Here is an earlier bug report involving Edgy and before. It was confirmed and its importance was high. But the bug is not fixed. Many people still use dial-up modems.
https://launchpad.net/ubuntu/+source/gnome-system-tools/+bug/22119 -- Dial-up modem in Network-Admin not functional in Feisty https://launchpad.net/bugs/94304 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
