Hi (Whoever is viewing this),

I managed to successfully install my internal modem (conexant chipset) on RHEL 4 (2.6.9-5.EL).

Successfully executed 'wvdialconf /etc/wvdial.conf'. Now when I run 'wvdial' the modem picks the line and starts dialing in tone dialing mode. Immediately after dialing, the line is dropped even before the connection is established.

My line supports pulse dialing. I faced the same problem in my Win XP. There, even after changing the dialing mode to pulse; the modem was still going for the tone. Finally, after a lot of tinkering I stumbled on this - when I added a ',' in the dialing rules box (where it is mentioned - type the number you use to access local lines) the modem was able to get the required pause before commencing pulse mode dialing.

I am sure it is the same case with RHEL 4 now, but I don't where to include that extra ',' in wvdial.

Any help would be greatly appreciated.

Hi,

I don't really know what exactly caused the file lock problem, but having edited the file /etc/ppp/options as:
lock
crtscts
defaultroute
noauth

and after subsequent reboots the problem was solved. Also, I found out that the link /dev/modem pointing to my internal modem /dev/ttySFSH0 was getting deleted everytime I rebooted. So I added the line,

ln -s /dev/ttySFSH0 dev/modem

to the /etc/rc.d/rc.local file and cleared that hurdle.

I was able to achieve the dialing mode change by changing the 'Dialing String' variable in the modem commands in Kppp modem settings from ATDT(tone) to ATDP(pulse).