Internet DSL auto disconnects in 11.4

While in internet my connection seem to be off after some time when I stop browsing. I connect via DSL modem and I turned off knetwork manager control over my DSL connection. I set up my connection on boot. Where can I fix it? Or where can I see the conf files for network connection setup?
I can bring back the connection via ‘rcnetwork restart’ though. help needed

I use ifup traditional method to connect to the internet. Where can I see connection timeout value?

come on, there should be a reason for this disconnection. Why does SUSE keeps disconnecting ?