When it stops working do they still get an IP address from the router?
(menu->start->run->type cmd->type ipconfig in the command window.)
if you logon to the router when it’s ‘broke’, does it have a public IP address?
i.e., are these numbers set on the front page?
ADSL Port
MAC Address 00:0f:b5:ce:af:a1
IP Address 81.178.66.21
Network Type PPPoA
IP Subnet Mask 255.255.255.255
Gateway IP Address 212.74.102.15
Domain Name Server 212.139.132.4
212.74.114.193
Does it say it’s connected to their ISP? Can you ping websites? That router provides a couple of troubleshooting tools that will help you determine where the problem lies.
Disconnect the phone from the socket, try again.
Do you have a spare splitter? (The little box that you plug the phone and router into), they can bloe and cause problems.
Is anyone else connected to the router? You can check to see if anyone is connected and it will provide a list.