Just half a meg more
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- Re: Just half a meg more
Re: Just half a meg more
31-05-2013 1:48 PM
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Re: Just half a meg more
31-05-2013 1:52 PM
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Re: Just half a meg more
31-05-2013 2:43 PM
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B/B troubleshooters reckon that I have been dropping connections twice a day for the last 3 days, but if it has I haven't noticed. but my profile altered 48hrs ago
Re: Just half a meg more
31-05-2013 4:19 PM
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The hub would have dropped the connection at least once, early this morning when your line was switched from ADSL1 to ADSL2+.
The line would have dropped at least twice yesterday. First time when you swapped the TG582N router for the BT hub in the morning, and when you had to restart the BT hub when you came back from the shops around 5.25pm.
The profile is basically low because the BT hub is I presume still connected to the exchange at 2,382 kbps from the image you provided this morning in the post at 11.35am. It is unlikely to return to previous higher rate until whatever caused the drastic drop in speeds yesterday afternoon is identified and resolved.
Could it be a faulty BT hub, or perhaps it was a fault at exchange all along? We don't know.
Has the B/B troubleshooter permitted you to escalate the problem to the Faults team to investigate? (I presume there would be a new open ticket)
Could you post latest screen capture from the DSL Diagnostics page (Not from the Router stats page) showing the 'Training History' ?
Re: Just half a meg more
31-05-2013 7:12 PM
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Regards Bob
Re: Just half a meg more
31-05-2013 8:14 PM
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From the latest image, I'm no expert, but we can see:
Yesterday, at 17.23 when you restarted the hub, it established a downstream line rate to the exchange of 2,048 kbps.
At 19.26, there was a disconnection. Reason unknown. Noise margin was fine at 6.0 db (mgn2) prior to the disconnection, so it was not likely to be due to noise. It successfully reconnected at 2,176 kbps.
This morning at 08.57, there was a disconnection but by 08.58. it had reconnected at 2,382 kbps but using ADSL2+ which was planned.
The hub remains connected at 2,382 kbps when you took a screen capture at 19.05 this evening.
FECs error counts is being reported, so this just confirms it is an interleaved connection. A high count is nothing to worry about.
CRCs are of more concern if they are extremely high for an interleaved connection, but the hub has only clocked up a trivial 157 CRC counts on the downstream connection in the past 10 hours.
The downstream noise margins are floating around the 6 db value (Mgn1 starting value, Mgn2 final/current value). The noise margin when you took the screen capture had dropped to 5db but that is to be expected as dusk draws nearer.
At the moment, it is still a mystery as to why the downstream rate dropped from 4,200 kbps which the hub was seeing yesterday morning (and 3,400 kbps by TG582n prior to that) to below 2,400 kbps since you restarted the hub yesterday at 5.23pm.
It could be due to more noise on the line or an issue at the exchange appearing yesterday afternoon, and the BT hub is just compensating by lowering the speed, to maintain the 6db noise margin.
'If' the BT hub has suddenly developed a fault yesterday afternoon, for reasons unknown, one way to prove it, would be to reinstall the Plusnet router to see if the speeds suddenly return to 3,000+ kbps values. My only concern is the switch from ADSL1 to ADSL2+ this morning also triggered an SNR reset. ie. 10 day line training has started. Someone more knowledgeable may be able to advise whether it is a good idea to try swapping out routers and how to go about it, without causing DLM to react negatively to the disconnection caused by the swap out.
Have you spoken to any of your neighbours to see if they have witnessed any internet speed problems lately if it is indeed an exchange problem ?
Re: Just half a meg more
01-06-2013 9:27 AM
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I nearly changed back to the PN router last night but bottled it at the last minute, the BT hub worked great before changing, and I know thins can go kaput suddenly but as no one has offered any further suggestions I think I will leave things as they are until I go on holiday, everything will be switched off , and just see what happens when I switch back on
Regards Bob
Re: Just half a meg more
01-06-2013 9:34 AM
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To argue with someone who has renounced the use of reason is like administering medicine to the dead - Thomas Paine
Re: Just half a meg more
01-06-2013 9:54 AM
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Re: Just half a meg more
01-06-2013 10:20 AM
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I used to switch my gateway off when I went on holiday, but when I came back my near perfect line always dropped from 7.15Mbps down to 1.5Mbps. It then took around 5 to 7 days of being back on before the speed recovered. So when Robert comes back from holiday, switch the modem on, ask Plusnet for a line reset to restart 10 day training, wait 10 days, and then run the fault troubleshooter if you still have problems. Now when I'm away I leave the gateway switch on as normal.
Re: Just half a meg more
01-06-2013 10:35 AM
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Thanks for the info, all duly noted and taken on board, just one question during the training period does the profile and speed adjust gradually or does it finally adjust at the end of the period.?
Re: Just half a meg more
01-06-2013 10:41 AM
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With regard to the profile and speed during training, the answer is neither, I'll explain more when I post back later.
However, leaving that aside, I've only just read parts of this thread, I need some more time to read all the detail before posting further but there is on thing you should not do at this stage and that is Disconnect or Reboot or swap any modem/routers. With the number of disconnects that have occurred recently and possibly some due to a line issue, you will be in danger of the Exchange DLM putting up the Target Noise Margin as it will think you have a dropping connection. This will result in slower speed. Only a line reset would be able to resolve that but if there is a fault, it cannot/won't be investigated during the 10 day training period.
Also whilst I understand what purleigh is saying, that is not generally the case.
I'll post some more shortly, but in the meantime Robert, I'm going to send to a PM regarding a privacy issue.
Re: Just half a meg more
01-06-2013 10:45 AM
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Re: Just half a meg more
01-06-2013 10:50 AM
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Re: Just half a meg more
01-06-2013 11:05 AM
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