Odd Issue And Sky Cant Figure Whats Wrong! SnR Drop causing lag spikes, stable at half original spee

Amrit

Amrit

Amrit

Associate
Joined
26 Oct 2006
Posts
99
Right so I need help guys since your all much more knowledgable than skys tier 2 lot.

Basically had sky for nearly 1.5 years.
Got 17meg on LLU
Perfect Ping
Then all of a sudden lag spike
Noticed SNR dropped to negative values when the spikes hit
COnnection didnt drop
No ring wire
New filters put
Connected to master socket
Found loads of errors on my line
Only stable now at 9meg and below
Sky put BT job in for port change -> Didnt work
BT Openreach checked inside property wiring ->All fine
Downstream Attenuation 27dB
They dont know whats going on...

Does anyone have and ideas on what to do or what i can ask sky to do?
 
I have a similar issue with sky. Had a few routers, had all the same checks as you, ended up having to settle for 9mb and whenever it randomly drops the line i have to switch router off then on to get my 9mb back as it resyncs at 4mb or below after the error.
I talked to a BT engineer today that was laying fibre optic cable outside my work today and he was saying it's probably sky's equipment in the exchange and that he'd seen it a few times himself.
 
I had a problem that sounds very similar to this.
It seems like it was a Freeview DVR box that I had. I'm not sure exactly what it did that caused the issue, it might have been when the fan kicked in or just when it turned on. I noticed it when it turned on to record a program and my net connection dropped.

Since I disconnected it not only did my SNR improve (as soon as I unpluged it) but also the SNR stopped droping into minus figures (it still drops a bit in the evening, but not usually enough to cause the router to disconnect).

So it may be any bit of electrical equipment causing it. If you can figure out anything that may turn on at random (matching when the problem occurs) then it might be worth unplugging that item to see if it helps.
Apparently it's not uncommon for it to happen to Sky boxes over time. I guess the shielding goes or something and then it causes problems.
 
Since Link time = 1 hours 11 min 35 sec
1st value is down and 2nd value is upstream
FEC: 1322353 0
CRC: 797 0
ES: 27 0
SES: 14 0
UAS: 0 0
LOS: 0 0
LOF: 0 0


Those are my stats for the past hour.
They still have not fixed it. They done a port swap, changed something to do with the frequency which has seemed to make it even worse.
This is even with my line capped from the max 17mb to 7999kb!
They NOW put the job to BT about a REIN engineer...im just worried they wont be able to fix something. How will they find out things like corroded lines?
 
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I've seen worse amounts but still, there's clearly still evidently a problem to diagnose here. Provided they're acknowledging that and doing SOMETHING, just be patient.

(Work for them by the way.)
 
Old@Heart said:
I've seen worse amounts but still, there's clearly still evidently a problem to diagnose here. Provided they're acknowledging that and doing SOMETHING, just be patient.

(Work for them by the way.)
Click to expand...

Old@Heart,

Im still getting the same issue. Not been resolved yet they dont know whats going on and BT are not helping sky.

Bsaically I found this out myself and hoping you can help solve it:

  1. Spikes happen when noise margin goes from 7db to negative values
  2. When my speed is capped in order to increase noise margin, I dont disconnect but still get the bad intermittant broadband
  3. When my speed is uncapped and I set the target margin using telnet commands to approx 14db, the lines is stable (errors are not gone but reduced a lot) and dont get as bad intermittant broadband.
  4. They sent me a new wireless N router. Its more stable in terms of sync drops but the problem is now I cant set the target margin myself with telnet commands or see the errors.
  5. Sky said they cant increase the target margin that much. I want to know from you what options do they have and do you know how they can increase the target margin but not place a cap on the speed?

Any ideas mate?
 
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