Kitz ADSL Broadband Information
adsl spacer  
Support this site
Home Broadband ISPs Tech Routers Wiki Forum
 
     
   Compare ISP   Rate your ISP
   Glossary   Glossary
 
Please login or register.

Login with username, password and session length
Advanced search  

News:

Pages: 1 2 [3] 4 5 ... 7

Author Topic: ADSL Max problems  (Read 31369 times)

markthomas

  • Member
  • **
  • Posts: 44
Re: ADSL Max problems
« Reply #30 on: October 28, 2008, 12:11:06 PM »

UKO tech support just called this morning to say that BT wholesale had rejected the fault as the line is still within the 10 day stabilisation period  :(.  They also said that they could not find any fault on the line!  UKO did say that this might be true as their system always detects a fault when a line is within the 10 day period. 

BT confirmed that the BRAS profile is due to be set in 12 hours time, UKO have asked me to wait a couple more days to see if the noise margin settles down (and speed increases).  If not then they will raise another fault with BT.  Based on the recent comments in this thread I don't think much will change when the 10 day period is over, I'll just have to wait and see...
Logged

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: ADSL Max problems
« Reply #31 on: October 28, 2008, 03:33:15 PM »

TBH I cant see the speed increasing..  The 10 day training period is all about setting something called the Maximum Stable Rate (MSR) + FTR.  Things that can occur during this 10 day period such as increasing the target SNR or switching on Interleaving can also (and do) happen during the whole of the time youre on Max.
The 10 days is also to give the DLM chance to increase the Target SNR and switch on Interleaving if necessary in order to stabilise the line at the beginning.

Theres more information How DSLMax works if youre interested.
It is true that they cant report a line fault during this period, to give the line the best chance to settle.

However, the huge fluctuations that you saw in your SNRM graphs arent normal and they do indicate some sort of REIN,  are you still seeing the same thing?
Logged
Please do not PM me with queries for broadband help as I may not be able to respond.
-----
How to get your router line stats :: ADSL Exchange Checker

markthomas

  • Member
  • **
  • Posts: 44
Re: ADSL Max problems
« Reply #32 on: October 28, 2008, 07:33:09 PM »

Kitz, thanks for the explanation.  I also agree that nothing is likely to change when the 10 day period is over, apart from the fact that BT will hopefully start to investigate  :).

Yes I am still seeing exactly the same SN margin fluctuations.  Just checked routerstats it is was at a steady 21.5db for 14 mins then dropped down to 9.5db for about 12 mins then increased back to 19.5db.   It does this 24hrs a day.  I have pretty much ruled out everything I can think of in my own property and have also tried an AM radio without much success (not entirely sure I know what to listen for...).

I am going to wait a few days to make sure that the 10 day period is well and truly over and I will go back to UKO.  Hopefully I can get them to request that a specialist REIN engineer visit.
Logged

markthomas

  • Member
  • **
  • Posts: 44
Re: ADSL Max problems
« Reply #33 on: October 28, 2008, 08:43:22 PM »

I have a bit of an update...

I read a thread in another forum regarding REIN where an openreach engineer described how he often drives around the local area near a suspected REIN fault in his van with the radio tuned to 612AM.  I tried this tonight and think I may have located the source.

I waited for the SN margin to drop and then went for a drive in the car.  As I got near the entrance to our housing development I noticed a significant change in the background noise on the radio.  I kept driving and the noise disappeared.  I turned around and drove back to the source and realised I was parked outside a pumping station!  I went home and started routerstats by which time the SN margin was back to normal.  I asked my wife to watch the laptop whilst I drove back to the pumping station and phoned home from my mobile.  As soon as my wife saw the SN margin drop I could hear the same background noise start on the radio, the noise even sounds like a pump.  The noise got quieter the further I drove away from the pumping station.  At least it's starting to make sense now... running 24 hours a day and starting up periodically!

Only problem now is what BT can do about a pumping station generating REIN.  Not quite as easy to fix as a fridge/freezer  :D.  I guess I may have to go back to the fixed rate service which is less susceptible to the interference.

Mark.
Logged

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: ADSL Max problems
« Reply #34 on: October 28, 2008, 11:41:39 PM »

Pumping stations have been mentioned before in the past as a source of noise.

Have you asked if your neighbours are also being affected... the more of you that stand together on this the better.
Logged
Please do not PM me with queries for broadband help as I may not be able to respond.
-----
How to get your router line stats :: ADSL Exchange Checker

markthomas

  • Member
  • **
  • Posts: 44
Re: ADSL Max problems
« Reply #35 on: October 29, 2008, 08:44:42 AM »

I know my next door neighbour has ADSL and I'm planning to speak to him tonight.  I will ask him if I can run routertstats against his router to see if he is experiencing the same problems.

Do you know if anyone has been able to resolve an issue with a pumping station causing REIN?  I am not sure whether it could be a fault with the pumping station or whether it is normal for it to produce this level of interference.

Mark.
Logged

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: ADSL Max problems
« Reply #36 on: October 29, 2008, 10:27:06 AM »

Ezzer is our "resident BT specialist" when it comes to REIN problems, so if he sees this he may have some suggestions.
Logged
Please do not PM me with queries for broadband help as I may not be able to respond.
-----
How to get your router line stats :: ADSL Exchange Checker

markthomas

  • Member
  • **
  • Posts: 44
Re: ADSL Max problems
« Reply #37 on: October 29, 2008, 01:38:52 PM »

Thanks Kitz...

One thing I have wondered (Ezzer may be able to answer this..) is whether the noise is picked up directly by the telephone line or my mains supply as it passes near the source.  If it is the latter then would an AV quality mains conditioner connected to my router and telephone eliminate the noise on the telephone line?  This would assume that it's the ADSL router/telephone than is transferring  the noise from the mains supply into the telephone line.  Not sure, just guessing really, but if there is anything I can do to eleminate the noise then I would be willing to try it.

Mark.
Logged

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: ADSL Max problems
« Reply #38 on: October 29, 2008, 02:14:14 PM »

AFAIK the noise is picked up on the telephone line itself. 
The interference attenuates the adsl signal as it passes past the offending source of noise, which is why the SNRM takes a dip.
Logged
Please do not PM me with queries for broadband help as I may not be able to respond.
-----
How to get your router line stats :: ADSL Exchange Checker

markthomas

  • Member
  • **
  • Posts: 44
Re: ADSL Max problems
« Reply #39 on: October 29, 2008, 06:50:03 PM »

Ok thanks for the explanation.... my 10 day stabilisation period is now over so I'm going to speak to UKO tech support  tonight to get another fault assigned to BT.

Mark.

Logged

markthomas

  • Member
  • **
  • Posts: 44
Re: ADSL Max problems
« Reply #40 on: November 01, 2008, 03:10:22 PM »

UkOnline have just called to say BT have now accepted that there are excessive noise fluctuations on my line and are sending an engineer Tuesday AM  :).  They are planning to check the line from the exchange all the way back to my house.

I'll let you know what happens...
Logged

jid

  • Content Team
  • Kitizen
  • *
  • Posts: 1945
Re: ADSL Max problems
« Reply #41 on: November 01, 2008, 03:11:16 PM »

UkOnline have just called to say BT have now accepted that there are excessive noise fluctuations on my line and are sending an engineer Tuesday AM  :).  They are planning to check the line from the exchange all the way back to my house.

I'll let you know what happens...

 :thumbs:

Good luck with engineer and keep us posted :)
Logged
Kind Regards
Jamie

BT FTTP - 75meg | Sky Q |  Bridgend Weather

Rahat

  • Reg Member
  • ***
  • Posts: 240
Re: ADSL Max problems
« Reply #42 on: November 01, 2008, 03:13:46 PM »

I need to get a BT engineer to check my line too. Far too much noise on it!
Logged

markthomas

  • Member
  • **
  • Posts: 44
Re: ADSL Max problems
« Reply #43 on: November 04, 2008, 02:32:47 PM »

Well the BT engineer visited this morning and confirmed everything we already know... I have massive fluctuations in my SN margin being caused by REIN.  I have to say he was more than a little impressed with the investigation I had already done (thanks to all of you...   :thumbs:).

He checked the line from the cab to my house and the internal wiring and said that my line was actually very good (physically at least).  With the attenuation and noise margin you get at initial sync the BT test software showed that my line was capable of up to 3mb  ;D.  Shortly after initial sync at 2mb the line drops and then re-syncs at 800k and the noise margin fluctuates from 22db down 9-12db and back up continuously as shown the previous graphs I have posted.

He fitted an NTE5 faceplate and re-connected all my extension wiring (disconnected by the last BT engineer) and everything is still the same.

The engineer is now going to escalate the problem so that a REIN specialist picks it up.  He said there is a specialist in my area who is very good at finding the source so hopefully he will pay a visit in the near future. 

I'll keep you all posted.  Once again thanks for all your help so far.

Mark.
Logged

roseway

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 43467
  • Penguins CAN fly
    • DSLstats
Re: ADSL Max problems
« Reply #44 on: November 04, 2008, 02:43:22 PM »

That sounds good Mark. I hope that the REIN specialist gets to the bottom of it. :)
Logged
  Eric
Pages: 1 2 [3] 4 5 ... 7