Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: MaximusPrime on September 24, 2016, 10:28:48 AM
-
Hi Guys,
there was a large network outage this month. My speed has not recovered since this.
DSL Stats says my Discovery & Medley Phases are: "Band Plan". I presume this means my line is banded?
I have an Engineer coming on Monday, what should I ask him to do to remove this?
cheers
-
No it doesn't mean that
-
@Dray,
what does it mean?
Edit: means these are the bands of data?
-
'Band Plan' has nothing to do with banding a connection. Bands are ranges of tones allocated to the connection, some for upstream and some for downstream. The 'Discovery Phase' shows the ranges which are initially available for use, and the 'Medley Phase' shows the ranges finally chosen during the modem/DSLAM negotiation.
-
@roseway,
cheers I understand.
My line must be banded because my speed is way low, any way I can check?
-
Not sure that you are banded, normally on VDSL you will see more than U0 and D1 bands of tones being used. Banded speeds are usually something like 39995kbps or some other figure close to a limit. I did have an intermittent problem where my bands in use looked like yours so I suspect there is something very wrong with your line as at those speeds VDSL is a waste of money ;) my line has now recovered from this issue though I have no idea how or why. Hopefully the OR guy can fixit.
Stuart
-
@broadstairs,
a previous Engineer showed me a note on his work iPhone that said my line was 3.4Mb I'm pretty sure.
That was before my faulty line got replaced though.
So I think with the latest network outage my line was banded to this figure based on this old estimation.
-
All I can say is that I'm staggered at your low speeds on VDSL with G.INP enabled. How far are you from the cabinet? Also what speeds do the BT Line checker say you should be getting?
Stuart
-
@broadstairs,
I usually get just under 8.8Mb. I'm 2.8km from my cabinet, 6km from my exchange.
The BT line checker is completely wrong.
It used to say Max 9Mb Min 5Mb but I had a faulty line that got replaced & my speeds have been downgraded to 4.1Mb Max & 2Mb Min & never restored.
-
Does seem a bit odd that the downstream rate is 3399 yet the attainable is 9091. Upstream of dead on 800 kbps also looks a bit suspect.
I went to MDWS to check your SNRm which was 14dB. However I just noticed that you had a resync this morning and youre currently at ~7Mbps.
-
@Kitz,
the Engineer visited yesterday morning. I asked him if my line was banded he said it wasn't but I found it coincidental my line resynced an hour & a half before he arrived...
My line has been a complete mess today (attached)
-
Any1 like to take a guess what's wrong with my line now?
Graph attached
-
Wow... that looks messy :(
Did you force the reconnect or did it lose sync this morning?
There was a spike of CRCs about that time, but other errors seem to look okish.
First thoughts are REIN/EMI, but without any defined pattern its hard to say. Dont think its crosstalk as the dips are the wrong way round.
-
@Kitz,
I didn't disconnect my modem, I want as few disconnections as I can because I thought it was crosstalk.
I think every1's DLM data got wiped in Network outages this month then my line got banded so others lines speeds got upped & my router is fighting it's way back up now.
Any ideas what could it be?
-
Behold the mess that is my SNR Graph:
-
Engineer came out & did a DLM reset, getting the highest speeds I've ever got
I'll have to wait & see if speeds remain high & connection remains stable:
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 6.8 6.4
Attenuation (dB) 35.5 0.0
Output Power (dBm) 9.8 10.5
Attainable Rate (Kbps) 11890 1293
Rate (Kbps) 9647 1293
-
Looks like some1 took a baseball bat to my SNR graph :(
-
That circuit is seriously defective . . . but I cannot see the cause. :no:
There is nothing obvious in the Hlog and QLN plots to indicate a physical problem with the MPF. :-\
-
@burakkucat,
I've came to the end of the road with this. OR don't have the ability or appetite to fix my line.
In your opinion would a drop to ADSL do any good? Other guys here said it wouldn't because the line is decrepit
I'm going to start looking for satellite alternatives because I'm through with this nonsense
-
In your opinion would a drop to ADSL do any good?
It would be difficult to make a viable suggestion. At present, all we know is that the D-side segment of the circuit is defective. To revert back to a G.992.X service would re-add the E-side into the MPF.
Other guys here said it wouldn't because the line is decrepit
Without having physical access to the pair and then performing various tests it would be difficult to say . . . but the above statement does seem to be the case.
I'm going to start looking for satellite alternatives because I'm through with this nonsense
Before looking at a satellite based service, I would urge you to consider migrating to Andrews and Arnold (http://aa.net.uk/) on a monthly contract and ask them to get the circuit fixed such that a G.993.2 based service is viable.
-
@burakkucat,
how could they fix the line? OR owns the line & it is the problem, any ISP I move to that uses the line will have this problem
Satellite if available would remove the line...
-
A&A would recognise the defects and continue to put pressure on Openreach to fix the circuit, unlike other ISPs/CPs who would just admit defeat and give up.
A&A have stated that they would take over a service, even when the underlying circuit is faulty and have pledged a money-back guarantee if they should fail. To date, there have been no reported cases where they've paid out.
Please research A&A and, perhaps, also ask Weaver for his opinion on their claims & abilities . . . :)
-
@burakkucat,
I've came to the end of the road with this. OR don't have the ability or appetite to fix my line.
On the offchance it might work, I had a similar but less pronounced problem a while back on my line which was intermittently dropping and the SNRM flying around. Moving to the master socket seemed to help so changed all the plates except for the master socket itself. After a while it happened again though. So back to the master and by pure chance, I poked a finger through the hole in the plate and waggled the spare pairs (I have a few) about - instant disconnect. Took the plate off and one leg of the active pair came adrift from the IDC in the process. Remade and all has been fine since.
-
@burakkucat,
thanks for the advice, I've put a load of pressure on OR, had about 10 call outs to no avail, my line is as bad now as it ever has been
@tbailey2,
I believe the problem is in the 2.8km underground cable, OR couldn't be bothered fixing it imo
-
As I understand it, A&A pay for a higher grade service guarantee with Openreach which is why they have more pull when it comes to getting things fixed.
-
AA have a "fix your line within one month" scheme. They actively solicit new customers with nightmare problems and have a reputation for pestering BT to get things resolved. When I've had recent line faults they have reviewed internally progress every day and kept on at BT.
If you went to them, you should get rid of extensions and try running without telephones on that line. You should pay your POTS line rental to them instead of to someone else e.g. BT so that there can be no buck-passing over faults.
AA don't do PSTN, they offer optional VoIP and will port you phone number if you wish.
They also resell an optional 'enhanced care' BT prioritised maintenance service (debate about what BT call it) discussed in an earlier thread. This is where BT should prioritise your fault and supposedly have a shorter time-to-fix. I use this on some of my lines.
-
Past 7 days I've had no problem with my connection
2 rounds of road works were done recently on the D side & 1 on the E side of my line
The Telephone ducts on the E side were exposed
Could the duct have been damaged & when it rains the rain enters the duct & disrupts the fiber cable?
-
Fibres should be shielded anyway. Nevermind that, water cannot affect fibre cables as they use light with total internal reflection, not electrical signals.
-
If your problem returns why not take out a new line through A&A, then once up and running cancel your existing line, that way you get a different line, hopefully without issues and if you do you have A&A backup to get it fixed.
-
@NEXUS2345,
if the water made the cable sway would it cause drop outs?
@Ronski,
Openreach aren't going to replace the cable for any1. If my VDSL continues to drop out I'll drop to ADSL, if it continues to disconnect then satellite
-
No, the idea of total internal reflection is that it allows light to move around bends and curves in the cable. It will affect where the light lands on the sensor at the Optical Termination Point, but otherwise it would not have any detrimental effect.
-
@NEXUS2345,
would Openreach & BT Retail know if a cabinet had a faulty fiber connection?
The engineers who come to my house only handle the D side connection
-
OpenReach should be able to tell, and so should Wholesale. If there was damage to the fibre it would be losing data packets or not transmitting data at all. Optical fibres usually have 0 packet loss so it should flag up immediately.
-
@NEXUS2345,
how would the stats for a faulty fiber cable look like?
-
It would manifest as packet loss or total failure. It would also affect all connected to the DSLAM, not just you.
-
@NEXUS2345,
looking at my SNR graphs would you say my problem is definitely not an E side problem?
-
You are on VDSL, so the E side has nothing to do with the parameters such as SNRM or even sync and attainable. The only thing that affects VDSL is the D side.
-
Openreach aren't going to replace the cable for any1. If my VDSL continues to drop out I'll drop to ADSL, if it continues to disconnect then satellite
Nope, you're probably right going by my experience, but the idea was that you'd get a different pair along the entire length from cabinet to the house with a new master socket as your existing line would still be active until you cancelled it after the new line was up and running.
-
@Ronski,
I've already had a D-side swap half way to the cabinet, the remainder of the cable is supposedly high gauge so should be good,
I've had the line from the pole to my house completely replaced & I have an Openreach MK3 face plate so my line is as good as can be
The real fix is a fiber cabinet out to my house