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Author Topic: Bad Noise Day & BT DLM  (Read 387 times)

tiffy

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Bad Noise Day & BT DLM
« on: July 16, 2017, 05:15:02 PM »

Had a very bad DS noise day yesterday between 09:00 & 15:00 hrs., exceptionally high DS CRC, ES & SES error rates my ILQ ended up heavily in the red for the 24 hour period.
I am on FTTC 38/2 with PN, fast path US & DS, G.Inp not active even though on Huawei cabinet & using HG612 modem.
I have never had any REIN issues to the best of my knowledge, resident in a very quiet suburban area.
My DS SNRM did step change very slightly a few times, approx. +/- 0.5dB. during the noisy period, it normally flat lines, currently around 7dB. since last re-synch..
I never actually dropped DSL / re-synch'ed yesterday as a result of the errors.

Now back to normal for my line with DS ES rate running at the bottom end of the amber ILQ zone.

Under yesterday's circumstances I was fully expecting DLM intervention this morning, likely application of DS interleaving as the system appears to be reluctant to apply G.Inp to my line, this did not happen !

The only explanation I can think of is that DLM has declared a Wide Area Event and my line was likely not the only line involved, any other suggestions welcome ?   
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Plusnet 38/2 - DSLStats/RPi - HG612/DGND3700v2 - Huawei Cab - MDWS ID tiffy

burakkucat

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Re: Bad Noise Day & BT DLM
« Reply #1 on: July 16, 2017, 05:51:53 PM »

That is interesting. Is your circuit now back to its normal behaviour?

Try as I might, I am unable to come up with any other likely cause for the observations that you have reported.
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tiffy

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Re: Bad Noise Day & BT DLM
« Reply #2 on: July 16, 2017, 06:50:56 PM »

Yes, back to normal since later in the day yesterday, ES running at the bottom end of ILQ amber catagory, not a lot over ILQ green.

I am only on fibre just over 5 weeks, initially converted from ADSL on fast path, had a similar bad noise day and DLM applied DS interleaving the next morning as per expectation.
DLM then reverted line to fast path a few days later where it has remained ever since in DS amber ILQ state until yesterday when the event occured.

I am on MDWS, user name tiffy.
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Plusnet 38/2 - DSLStats/RPi - HG612/DGND3700v2 - Huawei Cab - MDWS ID tiffy

tiffy

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Re: Bad Noise Day & BT DLM
« Reply #3 on: July 18, 2017, 07:58:58 AM »

Strangely enough, I have now achieved ILQ green status the last two days (speed profile) since recovering from the noise event on Saturday, still on fast path and still no G.Inp, 6 weeks on fibre tomorrow.

Will try a modem re-synch in a few days as I lost a few Mbps on DS synch rate, gained 1dB DS SNRM at the last re-synch on 14/07 which was system activated.
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Plusnet 38/2 - DSLStats/RPi - HG612/DGND3700v2 - Huawei Cab - MDWS ID tiffy
 

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