My Motorola Surfboard 4200 Cable Modem with Bigpond (Australian ISP) disconnects at random. I am connected through a router (Linksys BEFSR41), and another 2 computers are also connected. Connectivity is fine, the net works whenever the modem is online, but the problem is that the modem disconnects randomly, often in the middle of browsing or downloading. My modem was professionally installed by the Bigpond person, the modem was the one provided by Bigpond.
I am using WinXP Pro SP2, and the other two computers are using Win98SE and WinXP Pro SP1.
I can provide any other info you need, including modem config and logs (btw I havn't changed any of the modem settings, they are default).