I've recently had problems with my BT Hub frequently resetting. As well as happening at random times, it also seemed ot happen consistently when either making a phone call or answering an incoming call.
I'm posting the solution that worked for me, in case it is of help to others.
I found that this was due to a defective modem cable between the BT Hub and the ADSL filter socket. Replacing this with a new modem cable resolved the problem.
Further background on other things I had tried before this :
The Quiet Line test didn't show any particular problems with the line.
Replacing the ADSL filters didn't improve matters.
In response to another suggestion I tried moving the modem cable to ensure it was well away from power cables - and this was what alerted me to a problem with the modem cable itself. On moving this cable, I suddenly lost my broadband connection completely (the light went out on the hub) and wasn't able to get it back. This strongly suggested a problem with the cable. When I tried an alternative cable from an old modem the connection was restored and has remained stable since then.
Thanks for posting. Hopefully this will hep somone out. I'll mark as an accepted solution 🙂
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