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Administrator MrSaffron
(staff) Wed 03-Dec-14 14:25:15
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Re: Help,is this DLM? fluctuating Attenuation?


[re: deleted] [link to this post]
 
So long as the master socket is still there and you only wired stuff up to the rear of the removable faceplate then you should be fine.

BUT testing back at the main test socket in the property is needed to rule out a wire break/loose connection

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User deleted
(deleted) Wed 03-Dec-14 15:40:26
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Re: Help,is this DLM? fluctuating Attenuation?


[re: MrSaffron] [link to this post]
 
Ok thanks!

It dropped again last night,and sky say line testing is not in progress still,but I know assume that it's infact delayed.

I've left my technicolor router plugged in as advised and not put the sky router on.

Fingers crossed my technicolor doesn't start to 'Kernel warm start' a few times during testing and look at it as a disconnection.

Currently my line is showing after last nights disconnection

Uptime: 0 days, 13:01:42
DSL Type: ITU-T G.992.5
Bandwidth (Up/Down) [kbps/kbps]: 1.256 / 13.029
Data Transferred (Sent/Received) [MB/GB]: 167,36 / 1,99
Output Power (Up/Down) [dBm]: 12,0 / 19,2
Line Attenuation (Up/Down) [dB]: 17,0 / 33,5
SN Margin (Up/Down) [dB]: 6,2 / 3,0

Which is better than I have ever had,but I appreciate it is maxing my line out and when it's finished it will drop somewhat as I am about 2.5Km away from the exchange and I have ever only had about 10-11mb max
Standard User deleted
(deleted) Sat 06-Dec-14 16:05:35
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Re: Help,is this DLM? fluctuating Attenuation?


[re: deleted] [link to this post]
 
Quick update,my line was dropping a lot on Wednesday night from about 9pm and midnight.it dropped about 7 times,3 of which seemed to be in a row.

Now that night the DLM did not reset the line in the night,and it did not do it the next night.its only been running since the 1st dec,So I was wondering if because of the line drops the DLM is assessing things.The other problem is my router has warm restarted a couple of times which is annoying.

So today I decided to run router stats on my line for a few hours.

My downstream SNR is perfect straight line but my upstream is having around 1db spike's,is this normal,i've tried to included a graph of the spikes but not sure how to do it?


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Standard User deleted
(deleted) Sat 06-Dec-14 16:30:09
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Re: Help,is this DLM? fluctuating Attenuation?


[re: deleted] [link to this post]
 
You right click the pane and then select save from the menu.

This is mine:-

http://s5.postimg.org/cirbstah3/routerstats_image.jpg
Standard User deleted
(deleted) Sat 06-Dec-14 20:58:52
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Re: Help,is this DLM? fluctuating Attenuation?


[re: deleted] [link to this post]
 
Thanks, sorry I meant how to display the link on the forum. Think I've worked it out now using photo bucket.

Can I ask if you see any changes to the up/down SNR when you make a call?
Standard User ukhardy07
(knowledge is power) Sat 06-Dec-14 22:26:49
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Re: Help,is this DLM? fluctuating Attenuation?


[re: deleted] [link to this post]
 
Quick update,my line was dropping a lot on Wednesday night from about 9pm and midnight.it dropped about 7 times,3 of which seemed to be in a row.
This is unlikely to be DLM. It is likely Sky are trying fast speeds to assess if the line can handle it and the lines dropping.

Now that night the DLM did not reset the line in the night,and it did not do it the next night.its only been running since the 1st dec,So I was wondering if because of the line drops the DLM is assessing things
Ω
. It often will not do anything for multiple days, what it's looking for here is if the line can sustain that speed.

E.g. it will set the line to 13Mbps speed. It may then wait 72 hours before doing anything. WHY? It wants to see that there were 1) no drop outs in that 72 hours and 2) no big errors built up in that period.

DLM is quite extensive, it literally wants reliability and the aim is to set a speed where the line does not drop out. It's reliability over speed. If DLM made changes every few hours, it wouldn't be able to establish if there was stability, that takes days of monitoring.

The other problem is my router has warm restarted a couple of times which is annoying.
If this is happening, take your router, find the nearest bin and replace it. It's going to have a bigger impact on your line keeping this faulty router connected than just changing it immediately to the Sky hub. Pop the Sky hub in, also I have found it syncs higher than these speedtouch routers.

If your speeds end up poor, that's fine, ring sky and explain old router kept overheating and rebooting they can re-run DLM and start over the process.

Also key to note, DLM never really stops running, say you were not in the master socket and had poor wiring to the extension socket, and also turned off the router all the time during initial DLM, you may only sync at say 5Mbps.

If you then moved to the master socket and never turned the router off, DLM would notice the improvement in conditions, after a month or so of the better conditions DLM would re-run automatically and give you better speeds.

So today I decided to run router stats on my line for a few hours.
May as well post them up

My downstream SNR is perfect straight line but my upstream is having around 1db spike's,is this normal,i've tried to included a graph of the spikes but not sure how to do it?
That's fine.
Standard User ukhardy07
(knowledge is power) Sat 06-Dec-14 22:29:14
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Re: Help,is this DLM? fluctuating Attenuation?


[re: deleted] [link to this post]
 
It dropped again last night,and sky say line testing is not in progress still,but I know assume that it's infact delayed.

I've left my technicolor router plugged in as advised and not put the sky router on.

Fingers crossed my technicolor doesn't start to 'Kernel warm start' a few times during testing and look at it as a disconnection.

As already said...
Plug in Sky hub. We all assumed the technicolour router was fully working and would not keep rebooting itself. Just change it ASAP.

Sky Hub may sync a bit better too smile

It has set a noise margin of 3db so it's clearly thinking it's not a bad line.

MySky is VERRRYYYYYYY delayed as suggested.
Standard User deleted
(deleted) Sun 07-Dec-14 16:56:10
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Re: Help,is this DLM? fluctuating Attenuation?


[re: ukhardy07] [link to this post]
 
Thank you for your help on all my questions,it is really appreciated smile

Here is the links to my upload SNR from router stats,all the drops in noise correspond to when I have used the phone.

Today has been the most dramatic,,I can't hear any noise on the line,and the internet connection does not drop whilst on the phone.I had a major issue years ago where the line kept dropping when the phone was used,back then the SNR would drop to -100.and drop the line.So I guess i'm just a little paranoid as it was a journey to track the corroded joint by the SFI.

Hope these links work,,

yesterday

http://i175.photobucket.com/albums/w151/craggle_rock...

Today

http://i175.photobucket.com/albums/w151/craggle_rock...

R.E plugging the sky hub in,I actually forgot to say it's not here yet,I thought it would be by now,but sky say it will be here next week.

And my router stats

Uptime: 2 days, 0:33:40
DSL Type: ITU-T G.992.5
Bandwidth (Up/Down) [kbps/kbps]: 1.308 / 11.872
Data Transferred (Sent/Received) [GB/GB]: 1,71 / 3,21
Output Power (Up/Down) [dBm]: 12,1 / 19,2
Line Attenuation (Up/Down) [dB]: 17,1 / 33,5
SN Margin (Up/Down) [dB]: 4,6 / 4,2
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / BDCM
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): -
Error Seconds (Local/Remote): 120 / 5
FEC Errors (Up/Down): 0 / 328.546
CRC Errors (Up/Down): 738 / 332
HEC Errors (Up/Down): 1.182 / 0

All the disconnections/loss of signal has been reset when the router kernel warm restarted,which was when this last sync was.

Edited by deleted (Sun 07-Dec-14 17:01:16)

Standard User ukhardy07
(knowledge is power) Sun 07-Dec-14 17:02:58
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Re: Help,is this DLM? fluctuating Attenuation?


[re: deleted] [link to this post]
 
Nothing to be concerned about. I have seen ones which fluctuate A LOT, my line was far worse and would stay connected for months on end.

A key thing I have noticed is that these technicolour / speed touch routers (even for myself) seem to show a very stable noise margin. The Sky Hub and Netgear routers will show much more fluctuations. So it's one of those things don't get too worked up about smile

It's a shame that you have a faulty router during DLM, hopefully it won't affect things too much. It's not JUST disconnections it's also error build up.

IE lets of errors and a disconnection = bad
barely any errors and a disconnection = not so bad.

But disconnections do not help of course.
The Sky hub is decent, I've had it plugged in behind a fridge with uptimes of months on end without an issue.
Standard User deleted
(deleted) Mon 08-Dec-14 17:12:33
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Re: Help,is this DLM? fluctuating Attenuation?


[re: ukhardy07] [link to this post]
 
Thanks for your help again smile

According to my sky page DLM completed in the 6th. It only took 5 days. It says line is set to 13.3/2.5mb,,I think the higher upload is a bug. So looks like the disconnections on the 4th didn't effect to much., it does seem to look like it's set a 3db line as the stats are around 4-5 dB up/down.,I think that's too low maybe

I'll not resync manually until the sky hub arrives , whenever that will be, should of been here by now really.

I'll not get to paronoid when running router stats with the new hub he he smile
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