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 ... 16

Author Topic: EMI ?  (Read 64774 times)

Black Sheep

  • Helpful
  • Addicted Kitizen
  • *
  • Posts: 5717
Re: EMI ?
« Reply #30 on: July 09, 2013, 08:05:00 PM »

Thank you, I feel much better for it.  ;) ;D
Logged

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: EMI ?
« Reply #31 on: July 13, 2013, 06:36:18 PM »

Well last weekend when I borrowed the laptop, emptied & moved a bookcase/table thingy out of the way and tried to do some testing, the line behaved itself and I couldnt find any difference between using the NTE and the extension.

One thing I did find out (and remember) by carrying out this exercise is that the piece of furniture will not fit if I add an i-plate, as its right up to the doorframe as it is.  So if a vdsl faceplate is added in the current location, then the gap really is so tight that I wont be able to open the door to the  hall.   Not BTs problem, but Im now hoping that he will move the NTE permanently because I really have nowhere else for that piece of furniture to go :(

The line aside from some bouts of SNR and a couple of line drops seems to have been okish for the past week.   The fluctuations and drops are usually during the night.  Its far from my usual rock steady connection but since mostly the SNR fluctuations seem to be about 3dB I doubt anyone would take this as life threatening.


Today the attenuation has changed yet again.  Now at:- Line Attenuation (Up/Down) [dB]:   9,1 / 14,0

----

As we all know, attenuation shouldnt change and upstream issues are normally either a line fault or internal wiring.   Ive been unable to detect any difference between master socket and extension. 
QLT on phone seems ok, although admittedly not been able to do one at same time as the problems occur.   
Using the phone doesnt seem to cause any issues with my line stats
There is no pattern to the issues..  they mostly occur in the wee small hours or in the mornings.

-----

Previous Att (Annex_M) 7 / 12.5
Previous Att (adsl2+)  4 / 12

This is a record of my attenuation over the past few weeks

Code: [Select]
7,0 / 13,5
10,4 / 14,0
5,2 / 13,5
10,5 / 14,0
10,4 / 13,5 07/07/2013
10,4 / 14,0 11/07/2013
9,1 / 14,0 13/07/2013 10:59:12

Unfortunately Ive just upgraded dslstats so lost the ability to see all the old stats :(, but I have been able to recover the SNRM showing what happened today, and tried to reconstruct what I can from what info is available.  This is kind of typical of what I see.

10:55 first my upstream SNRm takes a loss of about 3dB, downstream loses 1.5 dB, things get flakey for a few mins. 
10:59 Attenuation changes
10:59 Upstream SNRM drops to 0dB (was previously 5dB)
10:59 Line drops
11:00 Line comes back up
11:24 Period of instability.  Upstream fluctuates between 4dB and 0dB  Corresponding fluctuations in downstream SNRM between 3dB and 1dB.  Line continues to hold.
11:45 Line begins to stabilise 4dB up 3dB down.
« Last Edit: July 13, 2013, 06:41:06 PM by kitz »
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

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: EMI ?
« Reply #32 on: July 13, 2013, 06:54:19 PM »

hmmmm...  Ive just this min recalled toulouses post

Ive been advised (how true or not this is Im not sure - because I really cant imaging it happening on 1st Aug exactly and think its a push to get me on Sky & lose annex-m) that my exchange is due to come under sky control.

All my problems seem to be around my upstream which is hit hardest, and if you recall one night I said I lost Annex_M (July 4th).   
Could it be possible that Sky/Be are doing something thats buggering about with their MSAN affecting my upstream/Annex-m connection....  or am I just being too suspicious?  Something weird is definitely happening though.  ???
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

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: EMI ?
« Reply #33 on: July 14, 2013, 11:36:27 AM »

This isnt right :(

Seen lots of loss of connections this am..  this is the atten log

Code: [Select]
13 Jul 2013 17:08:56 14.0 9.1
14 Jul 2013 06:00:17 14.0 8.7
14 Jul 2013 07:31:32 14.0 10.4
14 Jul 2013 07:33:06 14.0 7.9
14 Jul 2013 07:38:53 14.0 8.7
14 Jul 2013 07:40:27 14.0 7.9
14 Jul 2013 07:50:25 14.0 10.5
14 Jul 2013 07:51:59 14.0 4.5
14 Jul 2013 07:56:11 14.0 8.8
14 Jul 2013 08:03:32 14.0 10.4
14 Jul 2013 08:10:21 14.0 5.6
14 Jul 2013 08:48:37 13.5 8.6
14 Jul 2013 09:54:42 13.5 5.5
14 Jul 2013 10:00:28 14.0 7.0
14 Jul 2013 10:13:03 14.0 6.5
14 Jul 2013 10:27:45 13.5 8.1
14 Jul 2013 11:21:45 14.0 7.7

The upstream green spikes are actually negative SNRm values

-----
Edit

Off to get a wireless adapter for this PC, so at least I dont have to keep borrowing a lappy to test from the NTE.   
Not the best method I know but at least I should be able to let dslstats run for a while.


« Last Edit: July 14, 2013, 12:09:14 PM by kitz »
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

burakkucat

  • Respected
  • Senior Kitizen
  • *
  • Posts: 38300
  • Over the Rainbow Bridge
    • The ELRepo Project
Re: EMI ?
« Reply #34 on: July 14, 2013, 03:26:48 PM »

Not good. That does looks like a sick line.  :(

Have you checked with a good quality microfilter plugged directly into the test socket?
Logged
:cat:  100% Linux and, previously, Unix. Co-founder of the ELRepo Project.

Please consider making a donation to support the running of this site.

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: EMI ?
« Reply #35 on: July 14, 2013, 04:18:47 PM »

>> Have you checked with a good quality microfilter plugged directly into the test socket

Yep - did that last w/e when I borrowed the laptop, but the line was behaving itself then (both from master socket and extension).

Quote
Well last weekend when I borrowed the laptop, emptied & moved a bookcase/table thingy out of the way and tried to do some testing, the line behaved itself and I couldnt find any difference between using the NTE and the extension.

Line was mostly ok last week, aside from a couple of incidents in the wee small hours,  but its kicked off again this weekend in the mornings. 
atm its flatlining again and showing no signs of anything being wrong...  theres no pattern to the times when it misbehaves.  QLT is fine.

Anyhow got a wireless adapter now to put in the PC and i'll try rig something up so I can permanently record from the NTE - even if it does involve a trailing mains cable right across the door between hall and lounge.   Time to go emptying the bookcase again and moving furniture :(

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

sheddyian

  • Kitizen
  • ****
  • Posts: 1159
    • My Shed Blog
Re: EMI ?
« Reply #36 on: July 14, 2013, 07:26:29 PM »

Since they're the bane of my life at the moment...

It's not the PSU starting to fail is it?

Ian
Logged

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: EMI ?
« Reply #37 on: July 14, 2013, 07:41:31 PM »

Cheers - It dawned on me about 1/2 hr ago too,  thats the only thing I havent tried - about to go up into the loft to get an old router out.   ::)
Presently its running rock steady and flatlining at  5db down and 6dB up still from the extension where its been at since about mid-day.
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

sheddyian

  • Kitizen
  • ****
  • Posts: 1159
    • My Shed Blog
Re: EMI ?
« Reply #38 on: July 14, 2013, 08:08:44 PM »

I think the router and modem tinkerer's toolbox [1] should contain a 12 volt battery with a variety of power connectors on the end, to be used to rule out ailing PSUs and mains-borne noise!

A little sealed lead acid battery perhaps, or a homemade nicad/NiMH pack, or what I've done a couple of times - a battery pack from an old 12volt drill.


[1] Not to be confused with the router and modem tinkerer's's's social club, which is's.. here, isn't it?  ;D

Ian
« Last Edit: July 14, 2013, 08:40:42 PM by sheddyian »
Logged

burakkucat

  • Respected
  • Senior Kitizen
  • *
  • Posts: 38300
  • Over the Rainbow Bridge
    • The ELRepo Project
Re: EMI ?
« Reply #39 on: July 14, 2013, 08:13:02 PM »

The position of the apostrophe is important --

"The router and modem tinkerer's toolbox."

"The router and modem tinkerers' social club."

 :P
Logged
:cat:  100% Linux and, previously, Unix. Co-founder of the ELRepo Project.

Please consider making a donation to support the running of this site.

sheddyian

  • Kitizen
  • ****
  • Posts: 1159
    • My Shed Blog
Re: EMI ?
« Reply #40 on: July 14, 2013, 08:41:10 PM »

Fixed!  :-X
Logged

burakkucat

  • Respected
  • Senior Kitizen
  • *
  • Posts: 38300
  • Over the Rainbow Bridge
    • The ELRepo Project
Re: EMI ?
« Reply #41 on: July 14, 2013, 09:19:04 PM »

Logged
:cat:  100% Linux and, previously, Unix. Co-founder of the ELRepo Project.

Please consider making a donation to support the running of this site.

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: EMI ?
« Reply #42 on: July 14, 2013, 10:30:36 PM »

>>> modem tinkerer's's's social club, which is's.. here, isn't it?  ;D

 :lol: :lol: :lol:
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

sheddyian

  • Kitizen
  • ****
  • Posts: 1159
    • My Shed Blog
Re: EMI ?
« Reply #43 on: July 14, 2013, 11:31:13 PM »

Private Eye magazine started up a Pedant's corner on their letters page a few years back, to publish letters and comments from readers who were pointing out dull factual errors.

This led to much letter writing to Pedant's Corner as to the correct position of the apostrophe in Pedant's Corner.

As a result, each issue would have the apostrophe in a different position to the last.

Until someone suggested the idea of renaming it "Pedantry corner".

(Though there were then complaints when it filled the entire lower half of a page)

Ian

ps sorry for hijacking your thread Kitz - did the PSU make any difference?
Logged

kitz

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 33881
  • Trinity: Most guys do.
    • http://www.kitz.co.uk
Re: EMI ?
« Reply #44 on: July 15, 2013, 01:17:38 AM »

No worries, breaks up the monotony (or not) of my line.   

No not made any difference so far, but then again the line was behaving itself again before I hauled everything around to get to the master socket.

 And  I've only tripped over the damn cable 3 times so far... even though I know its there.. Grrrrr

House is a bit of an obsticle course with shifted furniture, books and other various items piled up on the floor to make it lighter to move... Trailing power cable at the bottom of the stairs and across the door from hall porch door into the lounge..   Fun times  ;D
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
Pages: 1 2 [3] 4 5 ... 16