Question #137495545 SNR and Sync
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- Re: Question #137495545 SNR and Sync
Question #137495545 SNR and Sync
09-11-2016 2:33 PM - edited 09-11-2016 2:53 PM
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1. let me say when you are going to ring somebody back make sure you do please it's annoying waiting for some one when they don't ring back.
2. I try and keep it simple, had a line fault last week, which was fixed on Tuesday night, my SNR was still fixed at 12dB, so phoned wednesday for it to be set back to 6dB and all was fine until friday night/saturday morning when it went back upto 9dB, phoned support who done tests and said all was fine and no errors.
So if there are no errors and line is fine why is it not sitting at 6dB and giving me a higher sync
3. Why on the tests he done does it show vpi vci has 0 when my router settings are 0/38
4. See attached graph, looks like I have a line/broadband fault again or just plain REIN/SHINE again which is giving me another headache again for slower speed when I know I can snyc at 4000 kbps
Re: Question #137495545 SNR and Sync
11-11-2016 12:55 PM
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Bump for some help and answers please
Re: Question #137495545 SNR and Sync
11-11-2016 1:29 PM
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Hi there,
If your line has switched back to a 9db target, this is what the DLM is deeming the best for your line to ensure stability, this does not mean there is a fault as the SNR is designed to change based on line conditions and some lines have an SNR margin of 15db (or more).
The VPI/VCI in the results pasted on the ticket are nothing to be concerned about, that's what they always show.
Upstream DSL Link Information | Downstream DSL Link Information | |
Loop Loss: | 35.8 | 52.6 |
SNR Margin: | 5.7 | 8.6 |
Errored Seconds: | 2 | 0 |
HEC Errors: | 0 | |
Cell Count: | 16930 | 289858 |
Speed: | 956 | 2525 |
Maximum Stable Rate (KBPS): | 2016 | Fault Threshold Rate (KBPS): | 1612 |
Mean Time Between Retrains (Seconds): | 21544 | Mean Time Between Errors Upstream (Seconds): | 552 |
Indicative Line Quality: | G | Mean Time Between Errors Downstream (Seconds): | 276 |
Your line is connecting above the fault threshold rate, meaning that if we did pass this through to our suppliers it would highly likely be rejected as the line is performing as expected and within the estimates too:
ADSL Products |
Downstream Line Rate(Mbps) |
Upstream Line Rate(Mbps) |
Downstream Range(Mbps) |
Availability Date |
Left in Jumper |
|||
---|---|---|---|---|---|---|---|---|
WBC ADSL 2+ | Up to 2.5 | -- | 1 to 4 | Available | -- | -- |
I'm not sure if you're aware but FTTC is available to you now:
Featured Products |
Downstream Line Rate(Mbps) |
Upstream Line Rate(Mbps) |
Downstream Range(Mbps) |
WBC FTTC Availability Date |
WBC SOGEA Availability Date |
Left in Jumper |
||
---|---|---|---|---|---|---|---|---|
High | Low | High | Low | |||||
VDSL Range A (Clean) | 47 | 35 | 9 | 6.2 | -- | Available | -- | -- |
Re: Question #137495545 SNR and Sync
11-11-2016 1:41 PM - edited 11-11-2016 1:44 PM
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So either my line is faulty or there is a REIN/SHINE issue, see graph again, you can see when the noise/fault is off I would get a higher sync and if it was cured I would go back to 6dB target with higher sync.
Can you not either send a BT engineer out for noisy line/REIN issue or set the target to 6dB with error correction off in which to force it to keep it at 6dB
Because I love being on a lower sync with this sort of problem when BT and the PN CS person not hellping when I know I can get a better line/sync oh and the best for my line would be 6db with this problem sorted, used to sync at 4400 kbps with O2 and it was like it for years, now you tell me that I can get it any more
Ps edit
I would have FIBRE when you can give it to me at the broadband and phone package price and not the stand alone price, and if the problem is REIN/SHINE then fibre would still be affected.
Re: Question #137495545 SNR and Sync
12-11-2016 10:59 AM
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So what about the graphs I've posted above and below then, does that not look like a problem to you, it does to me hence why I think my SNR is higher and the lower speed/sync then it used to.
Just to prove it heres one of my line on how it should be notice the higher sync and 6dB SNR
Oh and I have alot more of these aswell
Re: Question #137495545 SNR and Sync
14-11-2016 12:14 PM
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After updating my question last week and attaching a graph, plusnet support person rang up after doing more line tests and could see my problem in his tests with the spiking SNR and has agreed to send a BT engineer to get to the bottom of it, because he could not be sure if it was a line fault or a REIN issue.
Re: Question #137495545 SNR and Sync
14-11-2016 12:28 PM
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Re: Question #137495545 SNR and Sync
14-11-2016 12:31 PM
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Will do, some one in the BT forum has a similar problem with it doing it at least 16 times and hour and yet no answers or help for him.
Re: Question #137495545 SNR and Sync
15-11-2016 2:33 PM - edited 15-11-2016 3:52 PM
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BT engineer came and gone, he done all his tests that he could and says that the line is ok and can't see and problems with it
He did move his van around outside to try and find REIN and says it got worse when he parked next to the street light outside the front and could be a possible cause but can't tell as he has not got a portable radio to try and locate the source.
Edit
On a slightly different note I tryed my portable DAB radio today after a brain fart and I am hearing interference in the background and when you retune it to, but freeview tv is fine, seems after reading around that the LED or the transformer could be the cause as these are the new LED street lights which are controlled by county hall to go off at midnight.
Re: Question #137495545 SNR and Sync
19-11-2016 1:05 PM
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Why am I not surprised that the dozy BT engineer failed to test the line probably and just relied upon his machine to find the problem, can't even test the line at the pole or the cabinet to see if there is a problem there.
He is blaming BT for FAILING to give him a portable radio so he can find and diagnose a REIN problem, looks like I have to phone/update my question again just to get another BT engineer who might or might not understand what a REIN problem is and the other battle is trying to get them to report it to BT as a REIN problem just so I can get a REIN engineer out grrrrr
Re: Question #137495545 SNR and Sync
19-11-2016 3:59 PM
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Perhaps you should have a read of:
https://www.btwholesale.com/assets/documents/Orders_and_Faults/REIN_Introduction_for_CPs_v2.0.pdf
Openreach aren't responsible for all the possible sources of REIN, they do REIN investigations as a sort-of goodwill gesture, and even if they identify the source of the REIN, they can't compel the owner of the equipment to do something about it.
You could also have a search for the source yourself if you can obtain a portable AM radio.
FTTC may well be substantially less affected, because it uses a much wider frequency range. Even if the source of interference is emitting noise over a wide frequency range, higher frequencies have shorter range, so the range of the interference on the higher frequencies will be less.
This was a long REIN thread, ending with a switch to FTTC, which solved the problem.
Re: Question #137495545 SNR and Sync
25-11-2016 7:27 PM - edited 25-11-2016 8:31 PM
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Sorry EJS but I don't won't to get into an argument with you so I am going to ignore you.
Just had 2 disconnects in about 48 hours first one was on wednesday and the second one was at Friday (today) at 19:14 hours both times it was off for a couple of minutes and both times the phone line went dead, no tone on it as well as the adsl went down.
I know it won't be plusnet or BT at this time of night which points to a line fault, unless some one is running a line test on it which also causes it to happen but can't see that happening at this time of night
Re: Question #137495545 SNR and Sync
25-11-2016 8:01 PM
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The faults team sometimes work in the evenings, so both of those could well have been someone running a line test.
Re: Question #137495545 SNR and Sync
25-11-2016 8:36 PM
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My next BT engineer is for the 28th, not had any emails or phone calls about any work for my line so hence I thought a line fault but it did seem at first a line test.
On another note since I've moved across to the new network I've noticed that I am not moving from the gateway and that my IP address is not changing when these disconnects keep happening.
Re: Question #137495545 SNR and Sync
25-11-2016 9:00 PM
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The behaviour of your IP address and gateway is normal for the new network. Your IP address may change, but it will be in the same range or from certain ranges, which are specific to your part of the new network, which depends on geographic location. If you reconnect quickly, you may well get the same IP address.
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