The FTTC network does not suffer congestion like the 21CN does.

Wrong, once the fibre cables leave the cabinet and go to the exchange, they do not enter at any point in the exchange with the 21CN network.

Locky, did you get my trust message?
That ratty2012 who is mind an openreach engineer is a complete and utter noob. He even denies there is isn't congestion on BT's network and also denies people that live in London get routed to Sheffield then back to London.
I thinking of reporting him for a few slander remarks to open-reach see what they have to say.
I feel sorry for the customers on the forum and in real life. He's doing some real damage.
hopefully the infinity installation goes ok, what does the engineer actually do at my house?
Can get up to 55mbps with Infinty, will this be FTTC ? my nearest phone cabinet is around 400m away.
Think someone near my place had some fancy lights or amps causing a bit of interference on NYE, which had led to 8ms of interleaving on DS. I was away for NYE so don't know exactly what happened.
Interference starts early in afternoon (testing?) followed by probable party hours (8pm till midnight)
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Then after midnight, still on fastpath, everything is back to normal. But at 4am, DLM decides I need interleaving.
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Bloody marvellous. Attainable rate is 96meg, so hopefully this doesn't last more than a week.
What a tool. I'm going to jump in on him if he takes my bait.

you are getting large burst of noise from 4pm onwards and I think that is what is triggering DLM into interleave.

Yeah, this is just a once off and happened on Dec 31st so I suspect someone had some fancy equipment for a NYE party which caused some noise... fingers crossed anyway!
Also the level of incompetence in that thread on the BT forum is amazing.
General personal rant time - I'm originally from Aus (in UK since 2007) and sometimes get frustrated that there's not something more like Whirlpool.net.au for the UK - knowledgeable people in the UK broadband market are spread too thinly across various forums, which has the effect of lowering the general level of discussion and basic competence.
TBB is sort of OK, but the forum software is horrible and there are too many subforums. This thread is good, but it's just one thread.
General personal rant time - I'm originally from Aus (in UK since 2007) and sometimes get frustrated that there's not something more like Whirlpool.net.au for the UK - knowledgeable people in the UK broadband market are spread too thinly across various forums, which has the effect of lowering the general level of discussion and basic competence.
TBB is sort of OK, but the forum software is horrible and there are too many subforums. This thread is good, but it's just one thread.
.