When I try to PPP to my ISP I get the following message in /var/log/messages:
Connect: ppp0 <--> /dev/cua0
Serial line is looped back.
I have linked the "modem" with an ln -s to cua0 and I can use minicom and works just fine, but when I try to pppd with all the script that follows after that I got the message.
Hope this informations is enough