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[adslmax]

yes we know you have an immaculate line max, how you ended up DLM'd I dont know

Beat me, I dunno why! Stupid of DLM. I think it probably the work of openreach at my cabinet this week. I walk pass saw three openreach engineers work on the FTTC cabinet.

[kitz]

yes we know you have an immaculate line max, how you ended up DLM'd I dont know

His ErrSecs were extremely low so its not that.   The only thing I can think is there were 5 definite re-syncs showing on the RADIUS report that PN produced for him.
There were also a couple of very quick d/cs from the PN RADIUS - so quick you could hardly spot them - but max said they were just PPP reconnects whilst he was gateway hopping and he didnt do a full resync for those.   

[adslmax]

It was PPP reconnect to different gateway (these shouldn't affect DLM) as I have done it many times from February until few weeks ago then DLM went BANG on my line. But, when I saw openreach engineers working on my cabinet - it probably the reason for this:

Last February my FTTC is maximum rate of 113136k / 38700 with snr of 15.1 / 23.2
Current now my FTTC is maximum rate of 93260k / 33562k with snr of 9.7 / 15.0 (possibility engineer work on cabinet cause this?)

Latest stats:

Code: [Select]

Since Link time = 7 hours 5 min 11 sec
FEC: 0 99
CRC: 7 4
ES: 6 4
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0

[kitz]

The reduction in headline speed is more likely to be crosstalk.
Engineer was probably just adding another fttc line.  Theres plenty of discussions about crosstalk on here

[adslmax]

How far can downstream snr lower to for FTTC? I think it could be 6 and that's it. Can't go lower than that.

I think if it went down to 6 on snr (downstream) then maximum line rate could fall around 82000k, so I guess my 79999k will not be affecting?

[Chrysalis]

max when you next see engineer tell him he not allowed to install new line

[adslmax]

max when you next see engineer tell him he not allowed to install new line

No, I tell him to give me the cabinet key. So I will removed all 287 lines except my line!

[adslmax]

I found the table of crosstalk. This one is 200m away from the Cabinet:



[attachment deleted by admin]

[Chrysalis]

wow thats almost as brutal as my crosstalk got.

[kitz]

Ive lost a fair bit too although I didnt keep track of the days.   I'd just pulled out one of my early stats for another post and noted I started off at

Max:   Upstream rate = 35019 Kbps, Downstream rate = 107076 Kbps

Im now at

Max:    Upstream rate = 30455 Kbps, Downstream rate = 88730 Kbps

So thats 18346.. then I have to add on 3.5Mb for the increase the Zyxel gave me...  so my crosstalk loss is now running at circa 22Mbps

[adslmax]

Interesting stuff. I am glad I kept my record of FTTC when first activated a week after my FTTC cabinet went live. Openreach Engineer told me I am the first person to have it connected. So, 113 / 38 Meg is about right for my 200m away from cabinet.

I wish BT Openreach hurry up bring out vectoring nationwide (I hope next year) ?

[adslmax]

Bingo!

I know why the ES and CRC errors coming from....it was the kitchen long tubing light burst errors on FTTC. Every time I switch on, it will count 2 on ES and 4 on CRC.

Does any of you try this and see if I was right. I switch the light on after 11:30pm and I check with FTTC error and it spark a burst of error. So it was kitchen lighting cause it.

Code: [Select]

Latest 15 minutes time = 14 min 58 sec
FEC: 0 0
CRC: 19 0
ES: 10 2
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0

[attachment deleted by admin]

[attachment deleted by admin]

[Dray]

Shall you get a new tube and starter?

[NewtronStar]

I feel sorry for you guys/girls with crosstalk issues especially the users who have an attainable sync higher than Infinity 2 can provide 

[adslmax]

kitchen lighting turned off. No ES / CRC error for 10 minutes now