Guzzi, I did what you suggested and got the following.
[root@LinuxBox network-scripts]# ./ifup ppp0
./ifup: configuration for ppp0 not found.
Usage: ifup <device name>
The modem is a Conexant PCI modem and it does work using the Kppp dialer under KDE, but I want to be able to start the modem from my Windows PC using an SSH client (cos my other half is not very computer literate and does not have the patience to learn how to use Linux), hence the reason for wanting to start the modem from command line.
I got the following from a PC World minibook that came with Redhat 7.1 and it works.
I have put the following in the /etc/ppp/options file
Created this script file /etc/ppp/dialin
/usr/sbin/chat -v \
TIMEOUT 15 \
ABORT '\nBUSY\r' \
ABORT '\nNO ANSWER\r' \
ABORT '\nRINGING\r\n' \
'' \rATZ 'OK-+++\c-OK' ATH0 \
TIMEOUT 30 \
OK ATDTmyISPnumber \
CONNECT '' \
Created this script file /etc/ppp/cppp
exec /usr/sbin/pppd -d /dev/modem 57600 connect \
I ran /etc/ppp/cppp & from the console command line, the modem dialed in but kept disconnecting.
I entered my username and password into the /etc/ppp/pap-secrets file (seems like a bit of a security risk but for the moment I just want to get this to work)
Ran /etc/ppp/cppp & again and connected successfully "hooray".
The problem I have now is, I don't know how to get the modem to disconnect!
I am doing a bit of reading from a couple of books on Linux 6.0 but a lot of the files they refer to don't seem to exist on Redhat 8.0
Thanx for your help