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I have an E.O. line of approx 4.2Kms according to OR tech. My speed has been capped by T.T's DLM to 1024Kbps.
I am using one of my trusty 2WIRE 2700HG-B routers. It is showing a downstream atten. of 70dB. The downstream S.N.R.M varies between 12dB & 8dB.
I have had two visits by OR, a new filtered faceplate fitted, no extensions, and a pair swap.
Both visits confirm that there is no fault showing.
Is there anyway I could improve the situation? Re. poor speed?
Thanks
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4.2km sounds wrong...70dB is more like 5.5 to 6km of copper
To improve you need to go somewhere that will let you either be in control of the DLM yourself or the service has no DLM.
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The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
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Was told many years ago that it was >6Kms.
How do I find an ISP, that does not use DLM?
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Register (or login) on our website and you will not see this ad.
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Assuming you're on TT LLU, have you actually asked their forum OCEs to turn off DLM on your line? I know this could be done previously but this may have changed in recent times.
Otherwise moving to a TT reseller such as AAISP and Xilo might be your best bet as they don't use DLM on TT lines. AAISP can also set a 3db noise margin on TT lines to squeeze every last bit of speed from your line.
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Yes, I have a pending post on the TT forum now. All that is offered is another visit from OR with the usual warning of possible charges.
As far as I know, they refuse to turn off DLM,usually stating it is out of their control.
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2WIRE 2700HG-B
Have you tried a newer broadcom router/modem...a zyxel VMG8924-B10A for example....you can set your own target SNMR; this may only give you an approx 1 Mbps increase in sync.
With the zyxel and the broadcom chipset you can run monitoring software http://forum.kitz.co.uk/index.php/topic,21323.0.html for example.
Ian
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My thoughts exactly, 4km isn�t/shouldn�t equate to 70db attenuation.
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Unfortunately, lowering the SNRM brings a huge increase in errors. DLM sees this and lowers the speed.
The factors involved here appear to be, the poor quality of the line (possible aluminium), all my neighbours have a similar poor line, plus the added problem of the DLM.
https://www.thinkbroadband.com/speedtest/15232158066...
I used to be on a fixed 6dB SNRM, and synched at circa 1600kbps.
Edited by Brunel (Sun 08-Apr-18 20:40:29)
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Received this from TT
"I've optimised the connection and DLM will be monitoring this over the next 24hrs."
BUT... Nothing has changed??
We recorded your speed as
Download 838 KBits/s (104.75 KBytes/s)
Upload 432 KBits/s (54 KBytes/s)
"Hi Brunel
I've checked your previous thread and can see that we were unable to increase the sync speed any further and the next step would be to arrange an engineer visit."
Looks like we are now at a stalemate.
Edited by Brunel (Mon 09-Apr-18 11:36:13)
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I now believe that I am pushing them a little further.
"Unfortunately we are unable to deactivate DLM or change the line profile, apologies for this.
I can raise this as a complaint and a Complaints Manager can then look into this further. Would you like me to arrange this?"
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I now believe that I am pushing them a little bit further?
"Unfortunately we are unable to deactivate DLM or change the line profile, apologies for this.
I can raise this as a complaint and a Complaints Manager can then look into this further. Would you like me to arrange this?"
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Your best hope is getting TT to reset the DLM on your line, but as they cannot switch it off completely, it probably won't be long before the DLM kicks in again and you may potentially be in the same situation again. Its a shame TT no longer entertain requests to switch off DLM completely because they were one of the rare mass market ISPs to offer this.
If you do end being banded/capped again by their DLM, you may want to consider switching to Xilo or AAISP both of whom do not use DLM on TT based lines and can manually set your downstream SNR to 6db or lower.
Edited by deleted (Mon 09-Apr-18 13:11:59)
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Thanks for the info. I will wait for the "complaints manager" to contact me, before making any further decision.
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If you know the route of the cable you should be able to work out the line length using google maps.
My 6.1km line had an attenuation of about 63 db.
Have you been able to achieve faster speeds with pther ISPs?
Michael Chare
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I do not know the complete route, it is all U/G if it follows the main road then it is circa 5Km.
As far as attenuation, 63dB is the max. that a lot of routers will calculate up to. If I change to one of the TT supplied routers, it shows 63dB.
It has always been a bad line, have had a few pair swaps,
At the stage now of changing from TT to any ISP that will offer a fixed 6dB SNRM.
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A bit of a late post - had some captcha "challenges" trying to join the forums.
TT changed to a fully automated line management system SDLM which appear to be overly aggressive on long and what it thinks are poor lines. Ex-Sky customers seem to be particularly effect as I guess their DLM was far more forgiving.
The slightly strange thing is that people who complain on the TT forums about this, and raise the issues to the CEO's office very rarely post back on the forums.
Guess some sort of offer is made (even if it is only being allowed to leave with no early termination charges).
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IEFBR14??? Now there's a blast from the days when I earned an honest living.
John
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I am also waiting for a person from the CEO's office to contact me. Will see what if anything they offer.
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