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Standard User RobertoS
(sensei) Wed 07-Sep-11 19:51:04
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: MHC] [link to this post]
 
In reply to a post by MHC:
Your sync is still 38717 ... it is just throughput that is dropping.
IP Profile frown.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User RobertoS
(sensei) Wed 07-Sep-11 19:55:55
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: Anonymous] [link to this post]
 
In reply to a post by Anonymous:
I'm not for sure about the DLM Robertos mate. I'm sure I read somewhere here that there was one.
I didn't say there wasn't smile. I said it was a different one.

The DLM on FTTC is from Openreach and runs on the cabinet DSLAM. It is far superior to ... the DLM on ADSLx from BT Wholesale is from BT Wholesale and runs on their DSLAM/MSANs at the exchange.

I queried the existence of a 10-day training period on FTTC, and still do. As has been noted, your IP Profile is 38717kbps, the highest possible. Any speed fluctuations are down to your ISP and what you are doing.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User Croftie
(regular) Thu 08-Sep-11 02:04:06
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: RobertoS] [link to this post]
 
Appologies to the OP for going OT.

RE the training period, the post here may be of interest: http://community.bt.com/t5/BB-Speed-Connection-Issue...

Apparently the WBC FTTC Handbook states that the line is "allowed to stabilise during the first 10 days"

My theory is the stabilisation period lasts for 10 days but the line may stabilise before then if it's stable at full rate, yet it will remain in stabilisation mode for the full 10 days, after which the normal DLM starts.


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Standard User RobertoS
(sensei) Thu 08-Sep-11 10:07:18
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: Croftie] [link to this post]
 
The two sources you give there are examples of "myth-speak" I'm afraid.

The more important is that the WBC handbook, which you don't link to so I haven't read, is by definition not authoritative despite its title. As I have explained, the DLM on FTTC is nothing to do with WBC. Such documents are frequently written by "Technical Authors" whose job is to "interpret" what they are trying to explain, and often make assumptions that in this sort of situation that what was true with a similar product that they are familiar with is true with the new one. In other words fail to realise that the product is not a development of an existing one by a different company, but something totally different performing a different function.

The link you give to a post by RogerB, a guru, is highly suspect and I think based on such as the above. Note that in an earlier post he badly misspells "metallic", not something I would expect from anyone involved technically with Openreach products and terminology.

I have had a quick look through the Openreach description of the GEA service. Note that in the extract below that "train" refers to the process of negotiation between user modem and the Openreach cabinet DSLAM when establishing the connection, not a "training period" as applied to WBC products by the BT Wholesale kit. Similarly "trained up" means "connected and sync established". There is no mention in this of a training period of any length.

2.2.5 Dynamic Line Management
Dynamic Line Management (DLM) is employed in GEA-FTTC. DLM constantly
manages lines to maintain a target stability. It does this for as long as the product
exists.
At provision, the line is put on wide open profiles, allowing downstream line speeds
of up to 40Mbit/s, and upstream line speeds of up to 2Mbit/s or 10Mbit/s depending
on the upstream product option selected.
On the first day of operation, DLM will intervene if severe instability is detected.
Otherwise, DLM will wait until the day after provision before intervening, provided
that the line has been trained up for at least 15 minutes during the preceding day.
If DLM intervenes it will set a capped profile with a maximum rate and a minimum
rate, where the minimum rate is set at approximately half of the maximum rate. The
purpose of the minimum rate is to ensure that the line does not train at a rate which is
significantly below the level the line should be able to achieve. If this happened, then
the line is likely to remain at a very low rate till a re-train is forced by the user
powering off the Active NTE.
Note that the upstream throughput is also constrained on the DSLAM to the upstream
rate requested in the order, ie 2Mbit/s or 10Mbit/s, so even if the upstream line speed
is higher, the upstream throughput is constrained to the level ordered for the product.


My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.

Edited by RobertoS (Thu 08-Sep-11 10:08:23)

Standard User Croftie
(regular) Thu 08-Sep-11 17:05:53
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: RobertoS] [link to this post]
 
I didn't give two sources Robert. The source I gave was a quote taken from an openreach document, which isn't publicly available so I couldn't link to it. I havn't read it either.

Looks like you read back through the link I gave you which quotes more interesting reading from SIN 498, available here: http://www.sinet.bt.com/498v3p2.pdf
Anonymous
(Unregistered)Thu 08-Sep-11 17:56:28
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: Croftie] [link to this post]
 
^Croftie, if you dont mind, how did you get access to the document?? Do you work for BT?
Standard User Croftie
(regular) Thu 08-Sep-11 18:21:56
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: Anonymous] [link to this post]
 
Which one, 498v3p2.pdf? I googled it and the link came up. After which I discovered you can go here click search and enter the SIN number your looking for.

I don't work for BT no, although sometimes whish I did because it would be a lot easyer than trying to second guess everything.
Standard User RobertoS
(sensei) Thu 08-Sep-11 19:07:43
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: Croftie] [link to this post]
 
In reply to a post by Croftie:
I didn't give two sources Robert. The source I gave was a quote taken from an openreach document, which isn't publicly available so I couldn't link to it. I havn't read it either.
I assume you are talking about "the WBC FTTC Handbook". Unless you have given an incorrect title that is self-evidently not an Openreach document. It cannot therefore be relied upon.
Looks like you read back through the link I gave you which quotes more interesting reading from SIN 498, available here: http://www.sinet.bt.com/498v3p2.pdf
Having read the whole of SIN 498 myself, before my earlier reply to you where I quote from it, without having read back further in the linked thread once I established RogerB was unlikely to be reliable so I am unaware of what others have construed from it, there is no mention whatsoever of a 10-day training period.

SINs are the only reliable documents easily available to the public.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User RobertoS
(sensei) Thu 08-Sep-11 19:23:00
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: Croftie] [link to this post]
 
OK, I've now found a reference to the "WBC FTTC Handbook" in SIN 495, dated November 2009. Also I had missed RogerB's quote from it in the thread you linked to.

I reiterate I have grave doubts about how correct that will be, as explained previously. In particular it is certainly out of date as there is no 15Mbps floor on GEA now.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Anonymous
(Unregistered)Fri 09-Sep-11 09:19:11
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Re: Well Ive gone and done it too - Goodbye O2, welcome infi


[re: RobertoS] [link to this post]
 
Bad news this morning, picked up the phone to make a few calls and can hear some serious crackling -rather loud. Popped over to a neighbour to borrow their phone and getting the same thing. Plugged into the test socket behind the lower faceplate too, all the same, fault still there. So I called 151 reported the fault and she's doing a line test for me now. Should hear back in 10 minutes. Think this may have something to do with my Caller ID not working.

Bit worried now incase the modem downsteps due to the noise and goes onto a lower profile. Currently on 38717 / 10000. I expect if the noise gets any worse, it will be dropping down a peg or two. Is this right? Any advice on what else I can do?
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