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Author Topic: SNR and Attainable Rate Drop after Openreach working in Manhole  (Read 1418 times)

cwaite

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Over the past few weeks I have noticed my SNR has risen and my attanable rate has gone down from around 34mbps to 31 mbps, then yesterday around 11am I noticed an Openreach engineer working down a couple of manholes (ones that my cable runs through) then at around 3:45pm I noticed a large drop in SNR along with a large drop in Attanable rate to around 26mbps, does anyone have any ideas what would cause this.

I have put a link below to my HG612 Stats
https://1drv.ms/f/s!AuuoQtRhe-fgoJRqMdSF7KYmFj02Ug

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skyeci

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Re: SNR and Attainable Rate Drop after Openreach working in Manhole
« Reply #1 on: June 16, 2018, 10:43:45 AM »

sounds like a new subscriber causing cross talk perhaps against your line.

cwaite

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Re: SNR and Attainable Rate Drop after Openreach working in Manhole
« Reply #2 on: June 16, 2018, 10:49:28 AM »

Blimey I didnt think crosstalk would cause that much of a dip in the attainable rate.
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sotonsam

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Re: SNR and Attainable Rate Drop after Openreach working in Manhole
« Reply #3 on: June 16, 2018, 12:03:04 PM »

Unfortunately it can be a bit of a killer. People have been known to see 20mb drop from a crosstalker
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Vodafone FTTC 80/20. ECI Cab.

FTTP via Toob. 900/900.

j0hn

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Re: SNR and Attainable Rate Drop after Openreach working in Manhole
« Reply #4 on: June 16, 2018, 01:15:06 PM »

Your line absolutely baffles me cwaite
Your back on the Huawei cabinet again.

That's at least 3 times I've seen you swap from ECI to Huawei to ECI to Huawei.

At least you're back on the Huawei cabinet now.

I agree that it looks like crosstalk.
It actually sound like a neighbouring line has had a pair swap from a pair that wasn't affecting you to 1 which is.
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Talktalk FTTP 550/75 - Speedtest - BQM

cwaite

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Re: SNR and Attainable Rate Drop after Openreach working in Manhole
« Reply #5 on: June 16, 2018, 02:40:19 PM »

I am not sure why I have changed to different equiptment, I have always been on the same cabinet, is it possible they have both ECI and Huawei in my local cabinet?

Also how can you tell from my stats whether I am ECI or Huawei?
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j0hn

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Re: SNR and Attainable Rate Drop after Openreach working in Manhole
« Reply #6 on: June 16, 2018, 03:36:47 PM »

Apologies after looking through the search function seems I'm mixing your username with the user cwave (very similar usernames).
 :no:

So far they have gone ECI > Huawei > ECI
I mixed up the usernames and saw your G.INP and thought the cabinet type was changed again.
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Talktalk FTTP 550/75 - Speedtest - BQM