Been on BT Inifinity 2 for a few years, and it has been good (64 down 20 up) and rock solid . . . .
. . . . untill about 3 weeks ago.
Speeds dropped to 30 down 0.8 up, latency shot through the roof!
Tried calling - got nowhere after being disconnected several times!
Tried online support - a little better, just over a week ago an engineer visited and i waited patiently for an update or at least better speeds but alas still nothing.
This weekend purchased a new modem with linestats as the speeds atayed the same and i heard nothing back from BT.
The stats show;
|Link Power State||L0|
|Line Coding (Trellis)||On||On|
|SNR Margin (dB)||16.4||18.1|
|Output Power (dBm)||13.6||5.3|
|Attainable Rate (Kbps)||65073||12543|
|B (# of bytes in Mux Data Frame)||47||12|
|M (# of Mux Data Frames in an RS codeword)||1||1|
|T (# of Mux Data Frames in an OH sub-frame)||64||1|
|R (# of redundancy bytes in the RS codeword)||16||16|
|S (# of data symbols over which the RS code word spans)||0.0509||0.4781|
|L (# of bits transmitted in each data symbol)||10064||502|
|D (interleaver depth)||1273||37|
|I (interleaver block size in bytes)||64||30|
|N (RS codeword size)||64||30|
|INP (DMT symbol)||8.00||4.50|
|OH Frame Errors||1||0|
|RS Correctable Errors||255351358||11823948|
|RS Uncorrectable Errors||1||0|
The 'attainable rate' looks alot like the download speed i was getting a month ago, how do i get it back?
Please someone help me help myself!
Solved! Go to Solution.
You are in a banded profile probably due to your connection dropping often or manual resets or. Combination of both
This will recover automatically with noise margin dropping down to normal 6db and speed increasing nearer attainable this could take a few weeks to happen ghough. You need a stable connection 24/7 with no resets
All the resets have resulted in deep interleaving being applied and that will take even longer before the interleaving depth reduces
I guess its just wait it out then
It would have been usefull for the engineer to have explained that to me when he visited, as i have never had any problems with infinity i just assumed that it was the same process as ADSL.
With adsl the forum mods would be able to help with the banded profile and latency but with vdsl it is controlled by the DLM you need a broadband engineer visit and a problem fixed before engineer can get DLM reset.
A phone engineer as against a broadband engineer cannot get DLM reset
Its been some time . . .
Unfortunatley my line speeds have still not improved. I still have the stats previously posted but the speeds remain drastically lower than previous to this issue.