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[MaximusPrime]

@burakkucat,

CRC- Cyclic Redundancy check, FEC - Forward Error Correction

I understand CRCs & FECs are maths checks on the data transmitted, CRC's can't be corrected but FEC's can

A high number of FEC's would result in CRCs imo

[Dray]

FEC's are corrected - they aren't errors, they can't cause anything.

[MaximusPrime]

@Dray,

the higher the number of FEC's then the more data needs corrected.

Once the data becomes so corrupted it will no longer be able to be corrected resulting in CRC's?

[Dray]

Yeah but that won't be a FEC, that will be an uncorrected error. An errored second is a period of time (a second) which contains at least one error (e.g. an uncorrected error).

[MaximusPrime]

@Dray,

What's the difference between an ES & a SES then?

[Dray]

From the link I posted

A Severely Errored Second is a one second period which contains 30% or more errored blocks OR several other events

[MaximusPrime]

@Dray,

cheers, I'll have to ring again tomorrow. They said an Engineer would come out Saturday past but never did. Said they'd send me a conformation txt but never did either.

[Dray]

You can track BT faults here https://www.bt.com/faults

[MaximusPrime]

@Dray,

cheers, I've been using it & all methods of complaining for ages now lol 

[parkdale]

It took several vists over a couple of months to sort my line noise out but now i've gained 2db on my down stream.
Downside is I seem to get more errors on my line than before.... but it could be down to constant resync's.
So keep badgering them it will payoff in the end.

[MaximusPrime]

@parkdale,

I've been complaining for 7 months, it's nearly fixed but need this last problem sorted or it's all in vain

[MaximusPrime]

Guys,

how can you tell if your line is affected by Crosstalk when viewing DSL Stats graphs?

[ejs]

From the link I posted

A Severely Errored Second is a one second period which contains 30% or more errored blocks OR several other events

I'm not sure where that definition of a Severely Errored Second originates from, but for DSL, it's defined in G.997.1 as a second containing 18 or more CRC errors, or one of various other events.

[Dray]

Here http://www.kitz.co.uk/adsl/linestats_errors.htm

[ejs]

I gathered that, I was wondering where it came from originally.