Well I have to say that I completely agree with your analysis and this kind of behaviour would explain in part why BT is doing badly in its customer service ratings.
I've been having no end of problems with my HH5 dropping its connection - it wouldn't even bother me apart from the fact its screwing up my youview recordings since the BT G4 youview box does not automatically reconnect once the routers PPP session comes back up - I have to physically disconnect and reconnect its Ethernet cable, which is great if I'm at home and notice but absolutely blows if I'm at work and wanting to record something thats on during the day. That and its dropped the connection several times while watching a film on BTVision - made BT refund me for those...
I've been through my line with a fine tooth comb and everything is fine, HG612 will stay connected all day with no issues and very few errors, but even when the HH5 is used as a router only... still looses its PPP! with that goofy WAN event entry.
I have no doubt that if this could have been fixed with a firmware update BT would have done it by now, I really believe this is a hardware issue that can only be fixed by a product recall and would explain why BT are keeping their mouths shut over the issue as the cost of that will be pretty big.
Edited by deleted (Thu 08-May-14 07:51:40)