Nice post B*Cat ......... However, I think we'll have to take photgraphic evidence of the actual DLM stripped intp pieces, before some of the lads will accept this advice ??!!
Sorry to be argumentative, but the advice from TT doesn't support your viewpoint. For a start, it refers to a TalkTalk LLU connection, and their version of DLM is undoubtedly different to that used by BT. Secondly, they agree that switching off the router periodically doesn't carry a risk of triggering their DLM into slowing down the connection. What it may do in their system is result in a stuck profile.
I've never disputed that leaving the router on 24/7 is the best option in general, but switching it off each night won't result in the progressive slowdown which you have asserted.
This is just getting plain silly.
To reiterate, not only have I 'asserted' that switching the router off every evening can and does harm the speeds provided, I've also said that the ISP's I deal with on a daily basis give this information.
B*Cat has offered up this from his SP ........
"If your router keeps switching off, DLM can see this as instability and consequently slow your speeds to the slowest available in order to 'stabilise' the line." There's no conspiracy here Eric mate, this is what the engineers and ISP's have found to be the case. You may spend all day and night on here looking for the one exception to the rule that there always seems to be, but on the whole the message is switching your router off is detrimental to your speeds.
Accept defeat graciously sir.