reply to jamesonnorth
Re: Frequent DSL sync drops, reconnects, and jumping attenuation There is probably nothing you can do.
However I would first make sure that that nothing has changed on your end.
Try swapping out your filters for fresh ones, make sure that all of your jacks have filters whether there is a phone plugged in or not or completely disconnenct the wires to unused plugs (on the end closest to your nid) plug the modem directly into your nid and see if you get the same issues etc.
Also if you have determined the issue is not inside your house...
You might be able to ask a tech to switch you to a different loop (or wires in the loop) or have them move you to a different dslam and see if that helps as well.
The tech can also force your modem to connect at a slower speed which may also help fix connection stability.