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Message 1 of 10

Sudden speed drop

For over a year I've had a solid 70Mbs speed with an SNR c3.4dB (I live approx. 250m from the cabinet). At 10:32 on 26 March 2020 there was a resync (retrain reason 1) and my speed dropped to 50Mbs. I rebooted my modem (HG612) to no avail. The odd thing was that the SNR was still 3.4dB. I have rebooted the modem a couple times since with exactly the same results.  On 17 April 2020 at 23:54 there was a resync (retrain reason 2) with no change to the speed or SNR. This speed is now below the stay fast guarantee and I have got absolutely nowhere with the phone 'support'. I know I'm being paranoid but this happened three days after lockdown and BT saying they had plenty of capacity!

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Message 2 of 10

Re: Sudden speed drop

unfortunately as using a modem you won't be able to produce any meaningful stats unless modem is unlocked

enter phone number and post results  remember to delete number

check for line noise  dial 17070 option 2  should be silent and best with corded phone



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Message 3 of 10

Re: Sudden speed drop

Thanks for your speedy reply. Yes the modem is unlocked and I take a snapshot at 1400 every day. I've done the quiet line test - it's as quiet as the grave. What speed test do you want me to post?

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Message 4 of 10

Re: Sudden speed drop

more looking for the connection stats from modem

also looking for dslchecker results  I see I forgot to post link

https://www.broadbandchecker.btwholesale.com/#/ADSL



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Message 5 of 10

Re: Sudden speed drop

speed test.jpgpbParams-20200515-1400.jpg

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Message 6 of 10

Re: Sudden speed drop

Looking at connection stats you have a 51mb connection speed but your max attainable is only 50mb which is well below you expected speed range form dslchecker 

are you using the test socket with a filter to see if that improves your speed or at least increases attainable

quiet line test was ok and totally silent apart from announcement



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Message 7 of 10

Re: Sudden speed drop

I've tried everything but nothing has changed at the house. I want to know why the SNR remained the same when the speed dropped 20Mbs.

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Message 8 of 10

Re: Sudden speed drop

If it was just your connection speed that had dropped and attainable had remained in expected range then yes I would expect the noise margin to increase. However your attainable is actually slightly below the actual connection speed hence why I am suggesting connecting direct to test socket with a filter to see if that makes any change



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Message 9 of 10

Re: Sudden speed drop

Tried direct to test socket - no difference. Out of interest I am posting the stats for the day before the resync with the bit loading. Bits-20200325-1400-HIGH_RES.pngpbParams-20200325-1400.jpgBits-20200326-1032-HIGH_RES.png

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Message 10 of 10

Re: Sudden speed drop

If you have a dial tone,  there's is no line noise and you have tried test socket without improvement then need to phone 151 and report fault

 



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