The same with me. Have used the hub for almost a year with no problems, then since Saturday morning broadband light has been turning a solid orange for about 20 seconds 2 or 3 times a day.
Single disconnects for more than a few seconds can be BTW doing work on the line. There's a heck of a lot of work being done on fibre cables. And for example when they put in a new junction box under my pavement they had to cut and splice a 100 pair cable so 50 customers will have lost broadband for an hour without warning - it happens.
Frequent disconnection between hub and exchange can be so many things. Simple test you can try - if the BB is off for a few minutes do you still have a landline phone line? If not then the cable is disconnected, but if the landline still works then it's probably an exchange glitch.
Poor broadband with no phone is often a loose or cracked cable.
Problem - BTW will only respond to intermittent problems at the exchange end when they have had 3 complaints on the same DSLAM (or so I was told by a BTW engineer)
Complain twice, then escalate to the BT chairman's email address. You can guess it quite easily. Warning - I did that over a SNR/Speed crash every teatime, got a lot of attention from the I-team, but still no exchange fix.
Suggestioin - in these days of YouTube, why not film the Home Hub, entirely disconnected from any PC just connected to the line, and if the orange light comes on frequently, you have proof of the problem, proof it's entirely BT's problem as there is no PC attached, that you can post on YouTube if they don't fix it.
This has started happening to me for the past few weeks, was their ever a solution? getting rather annoyed with it now, some days its fine, other days it happens a lot.
the thread is almost 3 years old since last post - no way to tell if solution but not posting back is often a sign a solution was found just a pity they don't let everyone know the outcome