Try changing the permission (use chmod command) of /dev/cua2 and
/dev/ttyS2. The default setting upon installation is probably rxwr--r--
which won't let non root users access the modem.
I've encountered a problem on a Winbook laptop running
Mandrake 7.0 and kernel 2.2.14. Using a Linksys
combination ethernet/modem card, the eithernet card
works but the modem doesn't. In particular, minicom
can't talk to the modem. Using a different single modem
card, everything appears to work fine. However, the Linksys
combo card worked fine for both ethernet and modem when
running Mandrage 6.5 and kernel 2.2.13. One additional
bit of information: the modem also fails on a system
running RedHat 6.1 with kernel 2.2.12. Minicom seems
to communicate a bit better with the modem in that some
lights flicker when it is terminated, but it still doesn't
respond to AT with OK.
When the combo card is inserted, it appears to choose
interrupt 2, but changing the interrupt with setserial to
other plausible choices doesn't do any good.
Dept. of Mathematics, Northwestern Univ., Evanston, IL 60208