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Balderdash
Aspiring Contributor
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Message 1 of 3

Infinity downstream SNR drop 22/12 & subsequent speed drop - ideas?

 

Does anyone have any ideas which would explain a sudden drop in downstream SNR (2-3dB) which occurred on 22nd December as shown in the graph of the router statistics below?

 

Router is a Hub 6 and has been running very stable at 45Mb/s down and 16Mb/s up since the "free" speed boost for Infinity 1 customers a couple of months ago.

 

A week later (29/12) the connection resets and the new "normal" speeds are established at 40Mb/s down and 17Mb/s up which continue through to today.

 

What could cause such a sudden & defined drop in downstream SNR like that?

 

 

BT Infinity SNR drop 221217.png

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licquorice
Distinguished Sage
Distinguished Sage
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Message 2 of 3

Re: Infinity downstream SNR drop 22/12 & subsequent speed drop - ideas?

Just guessing here.  DLM decided to put you on the 3dB noise margin, it caused so many errors your speed actually dropped rather than increased, DLM decided to put you back to 6dB. You were previously running at 5dB with 50Mbs speed hence your speed is slightly slower due to increased noise margin. If you re-sync when your max speed is indicating higher you might get a better speed although you won't notice the difference.

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imjolly
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Message 3 of 3

Re: Infinity downstream SNR drop 22/12 & subsequent speed drop - ideas?

As your connection cannot reach the infinity 1 max then the speed boost would not have affected your connection. More like G.INP was activated by DLM



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