Do you find it happens on the same brand of router you are using? If so it could be some kind of conflict with certain cards, and that is what is causing the locks?
We mostly use Zyxel routers such as the Zyxel P-660H model so by default, the problems we see are pretty much all with one brand of router. I must admit I hadn't given any thought to the possibility of bugs/lockups etc. Do BT publish details of 3rd party routers known to have compatibility problems etc. that you are aware of?
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