Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: jimmyca69 on July 12, 2016, 01:11:30 PM
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Hi all
I wanted to get someone more knowledgeable than me to check my line stats to see if anything jumps out. I moved from Sky 80/20 FTTC to PlusNet's unlimited fibre extra. I had the Sky SR102 previously, but moved to a tweaked firmware HG612/RT-AC68U setup when I moved to PN.
On Sky I was getting around 60/20 connection but with PlusNet I am getting around 39/20. I checked the BT wholesale speed checker and it seems I have a 39/20 IP profile.
I have some basic line stats below but do have access to the HG612 Modem Stats software so can provide more if needed.
thanks in advance
(https://s32.postimg.org/xa4kfnx9x/image.png)
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I was going to say it looks like you're on the wrong profile, but there isn't a 40/20 profile. Your sync speed shoukd be much closer to you're attainable speed. It's possible your down stream speed has been banded.
I would suggest posting on the Plusnet forums or contacting them.
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Can you go to http://speedtest.btwholesale.com/ and run the tests there - including the 'Further Diagnostics' one and post what it says here.
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Can you go to http://speedtest.btwholesale.com/ and run the tests there - including the 'Further Diagnostics' one and post what it says here.
Results below:
Download speed achieved during the test was - 35.83 Mbps
For your connection, the acceptable range of speeds is 25.93 Mbps-37.05 Mbps .
Additional Information:
IP Profile for your line is - 37.05 Mbps
Upload speed achieved during the test was - 14.86Mbps
Additional Information:
Upstream Rate IP profile on your line is - 20 Mbps
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You moved to plusnet did they give you a free Modem/Router and have you tested it ?
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were you syncing at that before leaving sky? and have you been doing anything recently that would involve your line resyncing multiple times in the day? like testing different modems, rebooting them over and over or turning the power on and off.
if you just joined Plusnet and your syncing at 19999 upstream, you certainly shouldn't be syncing at 39999 downstream with that attainable and snrm. The line looks banded, and that would require an OR engineer visit to fix.
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How long since you moved ISP? What were the sync speeds on day 1? If they were different to the current sync speeds, when did they change?
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Could you also provide screenshots of the RT-AC68U settings please?
Asus are well known for some of their models not playing well with Openreach kit..
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Could you also provide screenshots of the RT-AC68U settings please?
Asus are well known for some of their models not playing well with Openreach kit..
That couldn't possibly affect the sync being way lower than attainable, and the sync figure looking banded. throughput speeds yes, but we can see the sync.
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Will try to answer all the questions put to me below....
- Didn't get free modem with PlusNet
- As original post I was getting around 60/20 sync and equivalent d/l speeds
- Haven't done anything recently to cause re-syncs (until yesterday when looking into it), in fact before yesterday it stated up time was around 180 days
- Joined PlusNet around Jan, when you say im sync'ing at 19999 up I shouldn't be getting 39999 down, do you mean it indicates I should be getting more down?
- As above joined fair few months ago, speed has been consistent - at start it was higher as I checked to compare and was around mid 50's but that was before any initial training etc.
- As per recent comment I don't see how the RT-AC68U settings would affect the sync speed of the HG612...
I contacted PlusNet technical support last night and the guy said it didn't look right as they had given me estimates of 52-72 speeds initially, he tried something and asked to reboot router to see if it worked. He said if it didn't sync higher then to raise a ticket and he sent me the link to do so. So will try that avenue as well.
If there are any other stats from the HG612 Modem Stats program that may be useful for me to post then please let me know!
Thanks all for your help so far :cool:
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the point being made was that you appear to be on 40/20, but Plusnet no longer sell this package. but now you've confirmed you joined in January, when they were selling 40/20. you're either on a 40/20 package, or you're on 80/20 and your line has been banded by dlm, and it's a massive coincidence that it's banded exactly at the 40 figure.
when you log into your Plusnet account, does it confirm what package you're on? if it is definitely the fibre extra, and Plusnet confirm they are not limiting your downstream, your line is banded. that will require an engineer visit and a dlm reset.
I wonder if Black Sheep could let us know if there's any recent policy on this? as he's stated a number of times engineers are told only to perform a reset if a fault has been found on OpenReachs side of the master socket. The applying of banding and said banding sticking appears to be becoming more and more common.
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Even if he was on the PN 40/20 product I'm sure the modem would be synced nearer the attainable and PN would limit the speed to 40.
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- Joined PlusNet around Jan, when you say im sync'ing at 19999 up I shouldn't be getting 39999 down, do you mean it indicates I should be getting more down?
Openreach sell packages (to ISPs) at 40/2, 40/10, 55/10 and 80/20. The speeds are limited by Openreach in such a way that means the modems will not sync any higher than the package speed. So ... the only way to have a 19.999Mbps upstream sync speed is with an 80/20 package at the Openreach wholesale level.
However, the 80/20 is a maximum ... and other limitations can restrict your actual sync speed. The most obvious limit is distance - where a long line simply cannot attain a sync speed of 80 Mbps, so settles for something lower.
The other limit is an artificially-imposed one, where BT's quality-monitoring process "DLM" decides that your line is too unstable (too many bit errors, or too many resyncs), so imposes a lower speed limit in one or both directions. When this happens, it is known as banding, and usually results in a sync speed that is a few kbps below the band. 39.999Mbps is often seen as the sync speed of a 40/2 or 40/10 package, but it can also appear as a "banded" sync speed for a 55/10 or 80/20 package.
When you combine the analysis of both upstream and downstream together, it looks like you have an Openreach wholesale package of 80/20, where the downstream has been banded (by BT's DLM process) to a limit of 40Mbps.
- As above joined fair few months ago, speed has been consistent - at start it was higher as I checked to compare and was around mid 50's but that was before any initial training etc.
The "attainable" speed gives you some idea what you could achieve if the banding weren't in place. Your's reads 52Mbps, and you probably could get that - and probably used to.
You also have to remember that, as takeup has increased, so has the interference from crosstalk. FTTC suffers from this more acutely than ADSL, and as the consequent noise increases on a line, speeds drop somewhat and bit errors increase.
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Thanks all
Yes definitely on the 80/20 Fibre extra package. I may have confused things by saying 40/20 but was only using it to show what I was sync'ing at.
Yes unfortunately aware of the crosstalk impact due to increased takeup, my house was on new estate and got full 80 before further new houses built and increased volume meant I went down to 55-60 :'( but no more houses in last 2 years so at least it peaked somewhat.
Will follow up with PN and see what they say as it does appear to be a banded line.
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For reference i have registered on mydslwebstats (username jimmyca69) so if anyone gets chance my data should be uploading now ;D
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Just to resurrect this, after the above PlusNet looked into the issue and noted i was on the 40/20 for some reason.
They did some tests and came back to me saying an engineer visit was required. Engineer came last Thursday (28th) he did some tests and said all ok but would need to go to exchange for further checks.
He came back and said everything was OK and in the end he had to ring through and request i was put onto 80/20. He was quite annoyed (i say annoyed, not that much!) that they hadn't managed this before sending him out - which was what PN actually said they would request.
Anyway after that i was syncing around 55/20 which was much more like it was. It seemed a little up/down after this but settled and speed tests etc showed connection OK. It all settled down and all sorted i thought.
However today i was clearing my junk email folder out and noticed 2 automated emails from MyDSLWebStats...
1) Thurs 28th - "Just to let you know that G.INP is now disabled for your line. Automatic message from MyDSLWebStats"
2) Sun 31st - "This is an advisory mail to let you know that G.INP is now enabled for your line with Downstream Sync of 39999kbps ...Automatic message from MyDSLWebStats"
So i just checked on my HG612 and the line is now back to 39,999 sync downstream >:(
Any suggestions of how to approach this? My stats should be online from when my PC has been on, not sure if that has caught anything. I also have copies of the test results from PN (GEA ones?) that i can share as well.
Thanks
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But there is no Openreach 40/20 speed product. Plusnet's 40/20 did not limit the sync speed. I'm guessing the thing that the engineer phoned someone up for was actually a DLM reset. The DLM reset removed the 40Mb banding, which the DLM later automatically put back again. I don't think it's possible for Plusnet to do a FTTC DLM reset themselves, so I don't think they could have done it before sending the engineer out.
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But there is no Openreach 40/20 speed product. Plusnet's 40/20 did not limit the sync speed. I'm guessing the thing that the engineer phoned someone up for was actually a DLM reset. The DLM reset removed the 40Mb banding, which the DLM later automatically put back again. I don't think it's possible for Plusnet to do a FTTC DLM reset themselves, so I don't think they could have done it before sending the engineer out.
Ok noted, its the 40/20 banding i mean not a product.
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I am starting to think DLM is bugged out somewhere, the amount of banding lately seems way excessive.
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It certainly sounds like the engineer has phoned for a DLM reset. This has removed the banding, but also removed G.INP and left your line with no interleaving or error correction, effectively completely open and on fastpath. This has resulted in a huge number of Error Seconds. I can see 2000-3000 per hour from the very short period you uploaded to MDWS. This has triggered DLM and reapplied the exact same banding to your line. The only way to have this removed would be another engineers visit, which Plusnet may not be as keen on a 2nd time.
If you do manage to get another DLM reset I would certainly be manually limiting my download sync considerably to reduce ES till G.INP is turned back on to try prevent the exact same thing happening again.
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It certainly sounds like the engineer has phoned for a DLM reset. This has removed the banding, but also removed G.INP and left your line with no interleaving or error correction, effectively completely open and on fastpath. This has resulted in a huge number of Error Seconds. I can see 2000-3000 per hour from the very short period you uploaded to MDWS. This has triggered DLM and reapplied the exact same banding to your line. The only way to have this removed would be another engineers visit, which Plusnet may not be as keen on a 2nd time.
If you do manage to get another DLM reset I would certainly be manually limiting my download sync considerably to reduce ES till G.INP is turned back on to try prevent the exact same thing happening again.
Thanks for this, very useful
Possibly dumb question but how would be best to limit download sync manually?
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What modem are you using?
You need to open a cmd and type "telnet 192.168.1.254", then type your username and password, then type adsl info --maxDataRate XXXXX XXXXX 1000000 or xdsl configure --maxDataRate XXXXX XXXXXX 1000000.
The first XXXXX being the Downstream Rate and the 2nd being the Upstream Rate you wish to limit too.
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I am starting to think DLM is bugged out somewhere, the amount of banding lately seems way excessive.
:drink:
I can only agree