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[MaximusPrime]

Upstream went straight again then another Disconnection....

[d2d4j]

Hi

I could be wrong sorry, but this sounds like you were disconnected at the point of straight line

If you look at your router, does it show connected time

Have you tried powering down your router and leaving fully with power disconnected for at least a minute, then powering back on

It's just a thought as a straight line would indicate no detail been received, hence straight line

Many thanks

John 

[MaximusPrime]

@d2d4j,

the downstream data was recorded when the upstream went straight so there wasn't a disconnection

[burakkucat]

Very puzzling. 

Your "disconnection", which I assume you mean to be a lack of Internet access, can be explained by the resynchronisation event. The pertinent question is "What caused the resynchronisation event?" 

[MaximusPrime]

@burakkucat,

why would the upstream go straight?

Could some1 else's router have disconnected then they rebooted - caused crosstalk that disconnected my internet?

[burakkucat]

why would the upstream go straight?

That is what is puzzling me.

Could some1 else's router have disconnected then they rebooted - caused crosstalk that disconnected my internet?

Quite simply, no. Your lack of Internet access is caused by your modem resynchronising with the DSLAM and the pair of them re-training.

[MaximusPrime]

@burakkucat,

would the trenches & bumps not be caused by crosstalk?

[kitz]

If you look very closely, the line isnt perfectly straight.

ie

Code: [Select]

20:33 - 7.8
20.34 - 7.9
20:35 - 7.8
20:36 - 7.9
20:37 - 8.0and so on.

The disconnection @ 5:01 was the DLM removing interleaving & INP from the upstream on bearer 1

At 21:40 you had a small sharp burst of downstream CRC errors at 21:40 the line disconnected.  In the same period you had 11 SES (severely errored seconds).   So it could possibly be a noise burst that took the line down.  If it was just CRC I'd say it was normal CRCs that can occur when a line comes back up

Could some1 else's router have disconnected then they rebooted - caused crosstalk that disconnected my internet?

No.  Crosstalk shows differently in your SNRm
In view of the fact you got some SES, far more likely to be an EMI noise spike - ie an electrical type source, for example someone flicking a light switch.

There is also a possibility it could be RFI, bearing in mind when I first looked at your QLN I saw possible signs of either RFI or EMI in the lower tones.

I find your QLN more interesting.   There's some lovely signs of crosstalk going on... plus some RFI.

would the trenches & bumps not be caused by crosstalk?

No, that is not crosstalk.  It shows differently and is obvious to the trained eye.
There is no correlation with the downstream, where if anything it usually shows the most.  Your downstream seems to be displaying signs of daily variance swing. which is typical of longer lines. If you look at the general curve over the course of the day, it starts to get worse as night falls and is at its best during daylight hours.

Crosstalk is a constant that is there or it isnt.  EMI/RFI fluctuates.

[MaximusPrime]

@kitz,

I meant the upstream was straight, it sat at 6.5db for an hour & 4 minutes then disconnection, started at 20.34

Noticed this has happened 4 times now...

I'll take a look out for flickering lights, cheers

[kitz]

I broke it down just to make sure that MDWS was recording and getting stats, which it was. 

Since outside of that period your upstream was only varying my 0.1 db then it was just a bit more stable than usual.
My overwhelming suspicion is there is perhaps something in the background causing a small amount of noise.  It could be in a neighbouring house they could turn something off, which is when they you get the steady line... and the burst when it gets switched back on.

The variance is so small that it is going to be very difficult to track down the exact source. 

[MaximusPrime]

@Kitz,

there is a house near the 2nd pole & a power transformer behind it,

there is a shed near the 1st pole & they use heavy machinery like tractors etc in it,

cheers for your analysis

[MaximusPrime]

Is there a joint underneath every pole?

I presume there must because there are tails up the poles so each pole must have a joint?

[burakkucat]

There will be an associated joint, where each tail joins the D-side cable. Depending upon the location, there may be a joint box adjacent to the base of the pole or, as in the case of the pole-top DP through which NewtronStar is connected, some distance away. But yes, your presumption is correct.

[MaximusPrime]

@burakkucat,

it is my belief my disconnections are caused due to tractors entering a gate that has a pole beside it.

The cable is buried in the ground under the entrance of this gate & the pole is on the left of the gate.

It's a grass verge & it is a mess due to the tractor tyres digging into it.

I think the weight of the tractor disconnects my internet

[NewtronStar]

@NewtronStar,

I contacted the CEO of Openreach & they replaced the cabling up the side of the pole.

Your Tail has been renewed/replaced and when this happens they open up the joint box and terminate each pair from distribution pole to that joint, the cable they use underground is called armored cable encased in a duct even a large digger would have a problem breaking that cable.

So a agricultural tractor at 24 tonnes should have no effect though the depth the cable is buried looks like 10 inch's