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Standard User Binary_Digit
(newbie) Fri 21-Feb-14 18:39:29
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Migration Speed drop (ADSL24 to Coms)


[link to this post]
 
After the initial migration from the O2 provided ADSL24 to TT provided Coms i noticed a speed drop, firstly as i was no longer on 3db but also my upload took a big hit. After complaining i was moved from TT to what seems to be Enta BT21CN, i'm now on FastPath and 3db. Yet i'm still synced at less than i would be via O2 ADSL24. My upload has more than halved and my download is still not what it was... Nothing has changed Hardware wise.

Anyone know why this would be?

Before: O2 ADSL24 (3db FP)
http://i.imgur.com/R99slmr.png

Current: Coms BT/Enta (3db FP)
http://i.imgur.com/Zui8blx.png

When i was first migrated to TTB (FP 6db)
http://i.imgur.com/Ax7I4Lf.jpg
Standard User DooGie
(committed) Fri 21-Feb-14 20:25:44
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Re: Migration Speed drop (ADSL24 to Coms)


[re: Binary_Digit] [link to this post]
 
My download speed is around the same as it was with ADSL24 but my upload speed is just over half what it was.
I can only think they've not sorted out all the bugs in their system yet. Especially as we were promised double the upload speed we used to have.

However I had to change my router as for some reason the Netgear DG834GT I was using wouldn't connect to their network. I tried several different firmware versions but didn't have any success so using a cheap ZyXEL for now.

Edited by DooGie (Fri 21-Feb-14 22:08:03)

Standard User RobertoS
(sensei) Fri 21-Feb-14 21:15:56
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Re: Migration Speed drop (ADSL24 to Coms)


[re: DooGie] [link to this post]
 
First edit wasn't good enough smile. You've got "download" twice in the first line.

My broadband basic info/help site - www.robertos.me.uk | Domains,site and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 59.4/14.4Mbps @ 600m. - BQM

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.


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Standard User j3214
(learned) Fri 21-Feb-14 21:26:13
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Re: Migration Speed drop (ADSL24 to Coms)


[re: Binary_Digit] [link to this post]
 
This is certainly interesting, and I am baffled.

The only thing that I think could explain this is the possibility that you were on a Broadcom DSLAM before you were moved. I have heard that some people say that the IFTN DSLAM (which TalkTalk LLU and BT 21CN uses) is slow and unstable. Though, this could be wrong, and I would hate to misinform you.

Even though you have stated no hardware changes have occurred at your end, it would not hurt to try a different filter, cable or modem if you have one, as any could stop functioning properly at any moment.

Maybe you have already tried this, but try and resynchronise around midday to see if the statistics turn out any better.

Edited by j3214 (Fri 21-Feb-14 21:29:16)

Standard User uno
(knowledge is power) Fri 21-Feb-14 22:02:22
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Re: Migration Speed drop (ADSL24 to Coms)


[re: Binary_Digit] [link to this post]
 
The main difference between O2W and TTB is the SNR profiling.

Whereas O2W profiles used to (generally) be the same up and down, the TTB upstream SNR is always higher than the downstream.

This means slightly lower upstreams. Annex M, if possible, can help with that though but it is not suitable for all.

Matt

uno Broadband
t: 0808 221 8642
Official Maidenhead, Milton Keynes & Sheffield Speedtest.net Host
Standard User My_brain_hurts
(learned) Fri 21-Feb-14 22:02:44
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Re: Migration Speed drop (ADSL24 to Coms)


[re: j3214] [link to this post]
 
My modem/router sync is about the same as it was pre changeover but my actual max download speed has dropped by about 15%. Doing a soft boot or a hard boot makes no difference. It's what's known as an 'improved service' apparently...
Standard User DooGie
(committed) Fri 21-Feb-14 22:10:32
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Re: Migration Speed drop (ADSL24 to Coms)


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
First edit wasn't good enough smile. You've got "download" twice in the first line.


Agreed smile
Standard User Binary_Digit
(newbie) Fri 21-Feb-14 22:54:38
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Re: Migration Speed drop (ADSL24 to Coms)


[re: uno] [link to this post]
 
Matt: Am I right in thinking that Annex M would be pointless on my line?
Standard User uno
(knowledge is power) Fri 21-Feb-14 22:56:03
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Re: Migration Speed drop (ADSL24 to Coms)


[re: Binary_Digit] [link to this post]
 
Might see a very small increase in upstream, likely a drop in downstream.

We only recommend Annex M over 16Mb but might be worth a try, assuming you can downgrade again.

Matt

uno Broadband
t: 0808 221 8642
Official Maidenhead, Milton Keynes & Sheffield Speedtest.net Host
Standard User RobertoS
(sensei) Fri 21-Feb-14 23:59:05
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Re: Migration Speed drop (ADSL24 to Coms)


[re: uno] [link to this post]
 
Well on O2/Be at 16Mbps sync on Annex A, the typical change on Annex M was a loss of about 2.5Mbps downstream with a tiny gain on upstream.

As the line got shorter, the loss of downstream decreased and the upstream gain increased. At around 20-21Mbps Annex A there would be zero downstream loss and close to 2.5Mbps upstream sync.

My broadband basic info/help site - www.robertos.me.uk | Domains,site and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 59.4/14.4Mbps @ 600m. - BQM

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
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