Talktalk HG633 Router Saga Summary

Just in case this helps anyone else diagnose their router:

If you have Fibre Broadband from Talktalk and you have a good reliable DSL connection to the exchange (no resyncs, no DSL drops), but your internet connection speed drops intermittently to 1Mbps or lower, and a reboot of the router normally fixes it, then you need a new router  - and not a Talktalk one.

My router had the latest firmware (according to their website, although one of the technicians said it was out of date). The network inside the house including wireless worked perfectly all the time.

My sync speed to the exchange was always good, and the DSL connection only dropped when I rebooted the router. Rebooting the router instantly fixed the problem, but it would return sometimes within minutes, sometimes many hours later.

They sent a BT engineer, who confirmed that the line was all good.

I also found out that simply restarting the DSL fixed the problem too. (Click Maintain then scroll down to DSL, then there is a restart DSL button right at the bottom).

After a 2 month diagnosis with Talktalk ended up getting a new Talktalk router and it had the same issues. I ordered a Netgear Nighthawk D7000 router and this solved my problems. Buy one from Amazon UK, and then you should be able to return it for a refund if it doesn't solve your problem (just don't take all the plastic off it etc)