For some of us, who have an obsessive curiosity, it would be interesting to know just how low your connection's DS Interleaving depth is as mentioned here:-
"40M-80M Downstream, Interleaving Low - 10M-20M Upstream, Interleaving Off"I am guessing that at a speed of 65.7Meg you probably haven't noticed much in the way of a deteriorated service?
If you recall, after my connection issues were finally fixed, I was able to achieve sync speeds of around 30 Mbps for quite a few months before it gradually started to decline to its current 20 Mbps.
This decline was put down to crosstalk as all physical line tests resulted in LTOK.
Crosstalk as more users have been connected is quite possibly the real reason as I did see a stepped deterioration starting early January 2013.
I can actually see/feel this deterioration, especially when working from home over a VPN connection to my employer's server(s) & my general internet 'experience' has also deteriorated.
At the time I eventually reported the speed decline (late April/early May), my DS speed estimate was still 30 Mbps.
i.e. my sustained sync speed was more than 25% below estimated speed, which warranted a number of engineer visits to investigate.
Apparently, my cabinet in now almost 'full', therefore various visiting engineers
assumed the deterioration must be due to increased crosstalk.
Within a few days of reporting the speed deterioration, the response was to lower my DS speed estimate to 22 Mbps, therefore my connection is supposedly now performing "within acceptable limits".
I did think that was a bit of a 'cop out' as there was no conclusive evidence that crosstalk had indeed caused the decline.
Now then, I notice the format of the
BT BROADBAND AVAILABILITY CHECKER has changed this morning:-
https://www.dslchecker.bt.com/It now shows estimates for
FTTC Range A (Clean) &
FTTC Range B (Impacted).
Unfortunately, there is no explanation of what 'Impacted' means.
Do you know if 'Impacted' is some sort of reference to connections impacted by crosstalk (or something else)?
For my connection, the estimated speeds are actually the same for Clean & Impacted.
See the attached screenshots, firstlky for my estimates before today & secondly today's estimates.