OK, I do not have anymore a /dev/ttyS0. Why, I have no idea. And that seems to be the reason that the modem does not respond. Now I created the device node with mknod /dev/ttyS0 c 4 64, with permissions set to root:tty. Then I get setserial /dev/ttyS0 -a /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4 Baud_base: 115200, close_delay: 50, divisor: 0 closing_wait: 3000 Flags: spd_normal skip_test auto_irq and the modem responds to minicom, microcom and fax receive/send. ray@xxxxxxxxxxx said: >> Fedora4 does not run setserial neither does DSL. > How do you know? Did you grep for "setserial" in the appropriate directory > (probably /etc/init.d)? If not, how did you check this? That is exactly what I did, grep for setserial in the appropriate directories. Yes with kernels 2.4.31, 2.6.14 I had a /dev/ttys0, however, not anymore with kernel 2.6.20. With kernel 2.17 modem responded to a setting of a symlink to /dev/tts/1. This symlink I kept with kernel 2.6.20 and the trouble started. Just now I resolved the issue. In /etc/udev/rules.d/modem.rules I changed the setting from NAME="/dev/tts/1" to NAME="ttyS0". Then running rc.udev and I have my /dev/ttyS0 back. ls -l /dev/modem lrwxrwxrwx 1 root root 5 2006-07-19 14:26 /dev/modem -> ttyS0 Much appreciated your help. Regards -- Peter - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs