Modem is responding at ttyS0.i am using kppp and pppd to dial ISP. it rings show connected at 38000 and then pppd died witn unknown error.
/var/log/messages show
connect: ppp0 <---> /dev/ttyS0
Hangup (SIGHUP)
modem hangup
connection terminated
still not able to figure out why its happeing.any body know something about the prolem