I have a Ubuntu linux (Ubuntu 6.06) at home. I have a ADSL modem (eth0) connected to it for my Broadband connection. It all works fine when the system gets started. But, when I receive a call, the link goes off. And then I lose my internet connection. I tried ifup/ifdown to bring the connection back, but it didnt work.
I also have an issue when I switch off the modem and switch it on again. The connection is lost. On checking syslog,there was an entry - 'Modem hang up' after the link went down.
I need to restart the system to get the connection back again. I am lost searching for solutions. Any pointers as to why this happens and how to rectify it without restarting?