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Author Topic: Band plan  (Read 6765 times)

MaximusPrime

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Band plan
« 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
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Dray

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Re: Band plan
« Reply #1 on: September 24, 2016, 10:35:43 AM »

No it doesn't mean that
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MaximusPrime

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Re: Band plan
« Reply #2 on: September 24, 2016, 10:44:30 AM »

@Dray,

what does it mean?

Edit: means these are the bands of data?
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roseway

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Re: Band plan
« Reply #3 on: September 24, 2016, 10:44:47 AM »

'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.
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MaximusPrime

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Re: Band plan
« Reply #4 on: September 24, 2016, 10:47:28 AM »

@roseway,

cheers I understand.

My line must be banded because my speed is way low, any way I can check?
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broadstairs

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Re: Band plan
« Reply #5 on: September 24, 2016, 12:45:20 PM »

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
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MaximusPrime

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Re: Band plan
« Reply #6 on: September 24, 2016, 01:06:35 PM »

@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.
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broadstairs

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Re: Band plan
« Reply #7 on: September 24, 2016, 05:56:23 PM »

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
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MaximusPrime

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Re: Band plan
« Reply #8 on: September 25, 2016, 04:06:17 PM »

@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.

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kitz

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Re: Band plan
« Reply #9 on: September 26, 2016, 11:00:56 AM »

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.
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How to get your router line stats :: ADSL Exchange Checker

MaximusPrime

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Re: Band plan
« Reply #10 on: September 27, 2016, 12:36:43 PM »

@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)
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MaximusPrime

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Re: Band plan
« Reply #11 on: September 28, 2016, 02:15:50 PM »

Any1 like to take a guess what's wrong with my line now?

Graph attached
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kitz

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Re: Band plan
« Reply #12 on: September 28, 2016, 04:29:58 PM »

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.
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MaximusPrime

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Re: Band plan
« Reply #13 on: September 28, 2016, 04:45:04 PM »

@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?
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MaximusPrime

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Re: Band plan
« Reply #14 on: September 29, 2016, 09:04:05 PM »

Behold the mess that is my SNR Graph:
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