DGN2200 (n300) drops connection every few hours for a minute

[mkrex]

I have had the DGN2200 for a few months now. I have had lots of issues with it.

The connection drops for a minute or so every 2-4 hours for a minute.
Router status says that it is still connected to the internet, with all the appropriate information set.

I am in the UK on Talk Talk talk.

Disable SIP ALG checked.
I have changed the filter on the phone line several times.

I am connected via cat5 wire to the router.

I can plug in my 10 year old Netgear DG834G and I do not have the same problems.