We have an SDSL line which when plugged straight into one port on our switch and then attached to one PC performs fine - and stays up.
When we connect said line to our server and push it out across the whole network (50 PCs or so) it works fine for about half an hour then falls over.
We have an ADSL line from the same provider which does not exhibit this behaviour - works fine for ages on the whole network.
The provider has run tests on the line and says its fine - which makes sense as it's fine on the one PC. They won't test anything at our end as they only work with Cisco equipment - we have Netgear switches.
Has anyone come across a similar problem in the past? - If so, any hints?!