I am providing this info here so that it might be useful to anyone out there who are trying connect their Nokia 6020 to internet using CA-42 data cable.
After some Googling, I was able to connect my FC4 and FC5 to the internet (GPRS internet provided Airtel in India) using my brand new Nokia 6020 and CA-42 data cable. In fact, I am writing this post from my FC5.
Anyways, this is what I did:
1. Su to root and enter run modprobe using the product and vendor ID of CA-42.
[ilyushin@localhost ~]$ su
[root@localhost ilyushin]# /sbin/modprobe usbserial vendor=0x0421 product=0x0802
2. Now connect your 6020 to the PC via the CA-42 cable.
3. Then run the command "wvdialconf create"
[root@localhost ilyushin]# wvdialconf create
It will scan the ports for modem. It should find a Nokia modem in one of the ports. In my case, it was detected in '/dev/ttyACM0'.
4. Now, open KPPP. Provide the root passoword when prompted.
Now create a new connection with the following Account details:
Name : Airtel (anything!)
Number : *99#
Authentication : script-based (select from list)
The rest of the Account settings you can keep as default.
Now click on the Modem tab and provide the following Modem details:
Name : Nokia 6020 (anything!)
Modem : /dev/ttyACM0 (select from list)
Speed : 115200 (select from list)
Now, from the KPPP main window, select our new connection and click on "CONNECT".
Thats it ! After "Modem Ready" and "Logging on to Network" messages displayed, KPPP will establish the connection and will minimize to the task bar.
If you face any issues, please let me know. Though I am not an expert, I might be able to provide some kind of help.