G.DMT or ADSL2+?

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simon14

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#62358 4-Jun-2010 19:35

Was playing around in my router settings and noticed that my ADSL mode was set to G.DMT, so i changed it to ADSL2+ becuase i'm on the red network which has adsl2+ enabled. This change increased my sync speed by about 300kbps download. What's the different between G.DMT and ADSL2+? Is G.DMT adsl1? Why would my router be set to that my default?

cyril7

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#338451 5-Jun-2010 08:54

Yes G.DMT is ADSL1, dont know why it would be the default, most modems select mutimode which is essentially automatic so they go as high as possible.

The fact the Sync rate increased only 300kb/s indicates you are probably better off staying on ADSL1, maybe you could post those rates.

Cyril

simon14

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#338468 5-Jun-2010 10:27

The main reason i changed it to adsl2+ is so i know when my cabinet is installed.... it's due to be done by the end of this year.

If i kept it on G>DMT, i'd never know would i?

Line stats:

     Downstream     Upstream

SNR Margin

:
    8.4     13.4     db

Line Attenuation

:
    34.4     25.5     db

Data Rate

:
    8227     863     kbps

cyril7

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#338630 5-Jun-2010 20:58

Hi, if you are on th ered network then there is no way you will ever be cabnetised, or if you are you will suffer poor sync rates.

The speeds you are getting are consistant with your attenuation which implies around 2.5km of cable.

If the telecom wholesale site states your address will eventually be cabinetised then I recommend you change back to a telecom wholesale plan to get better speeds.

Cyril

simon14

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#338633 5-Jun-2010 21:03

cyril7: Hi, if you are on th ered network then there is no way you will ever be cabnetised, or if you are you will suffer poor sync rates.

The speeds you are getting are consistant with your attenuation which implies around 2.5km of cable.

If the telecom wholesale site states your address will eventually be cabinetised then I recommend you change back to a telecom wholesale plan to get better speeds.

Cyril

I'm changing to a wholesale plan next month.

Most people who are on the red network and who have a cabinet installed nearby, will get moved to wholesale automatically anyway.

eXDee

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#338777 6-Jun-2010 13:38

simon14: Most people who are on the red network and who have a cabinet installed nearby, will get moved to wholesale automatically anyway.

Source of this info? i was under the impression they didnt.

cyril7

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#338784 6-Jun-2010 14:05

I think you will find they have a general policy to do so, but as with most things, if you want to get results it pays to drive the process as much as you can yourself to get what you want.

Cyril

webwat

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#341938 15-Jun-2010 15:01

cyril7: Yes G.DMT is ADSL1, dont know why it would be the default, most modems select mutimode which is essentially automatic so they go as high as possible.

The fact the Sync rate increased only 300kb/s indicates you are probably better off staying on ADSL1, maybe you could post those rates.

Cyril

ADSL2+ will slow down automatically if the sync speed isn't reliable using Seamless Rate Adaptation. Looks like your noise margin is a bit low so might be more stable and/or slower. However, Vodafone's RED network can use PPPoE to get faster speeds, at least something to experiment with before you switch back to Telecom.

Time to find a new industry!