Stuck on G.DMT?
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Stuck on G.DMT?
13-10-2014 9:07 PM
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When using another provider I had the option to sync my router using ADSL2+ on the 21CN network. I then moved to BT and was put on a G.DMT service probably for stability reasons. I would like to switch back to ADSL2+ if that's possible? I have a friend who lives nearby who recently also moved back onto ADSL2+ and get's better sync speeds as a result. I've only been migrated over a few days, do I need to wait for any line settling period? or does that not matter on a migration?
Many thanks for any replies.
Re: Stuck on G.DMT?
13-10-2014 10:10 PM
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Can you post the stats from the router - noise margin, speed and attenuation
What does this say about WBC on 21CN http://usertools.plus.net/exchanges/
A migration is normally like for like and the only reason you are on G.DMT is usually because you are on 20CN as a Plusnet router would usually report it as being ITU-T G.992.1 or 2 or 3 if you were on 21CN
Re: Stuck on G.DMT?
13-10-2014 10:38 PM
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Quote DSL Type: ITU-T G.992.1
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Stuck on G.DMT?
13-10-2014 11:13 PM
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Colour: Green 20CN VP capacity at this exchange is currently showing as Green.
Click here for further details
Colour: Green BT have advised that this exchange is enabled for WBC on 21CN
Colour: Unknown You can view recent Service Outages for this exchange here
Colour: Unknown BT have published Max DSL upgrade information for this exchange
Click here for further details
Line Stats - I use my own Draytek router, set to multi mode so will pick up whatever is offered, currently G.DMT but I have seen it on ADSL2+ with other providers.
Mode State Up Speed Down Speed SNR Margin Loop Att.
G.DMT SHOWTIME 480000 1984000 4 62
Re: Stuck on G.DMT?
13-10-2014 11:21 PM
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If 448 then you are definitely on ADSL1 but whether you are on 20CN or 21CN only Plusnet can definitely say
@Jelv
Thanks - in the dim and distant past on 20CN it was reported as G.DMT although I have no idea which router I was using at that time
Re: Stuck on G.DMT?
14-10-2014 6:16 AM
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In my experience, ADSL1 might achieve the highest line speed, but ADSL2 has better error correction. My exchange doesn't seem to do an auto fall back from ADSL2+ to ADSL2 so I get a better speed if I select ADSL2 at my end rather than leaving it on auto which ends up on ADSL2+.
Re: Stuck on G.DMT?
14-10-2014 8:21 AM
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Edit: Example of 20CN test attached - I'm on Max Premium hence the faster upload.
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Stuck on G.DMT?
14-10-2014 8:32 AM
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Re: Stuck on G.DMT?
14-10-2014 9:49 AM
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Quote from: ejs My exchange doesn't seem to do an auto fall back from ADSL2+ to ADSL2 so I get a better speed if I select ADSL2 at my end rather than leaving it on auto which ends up on ADSL2+.
A quick check on the frequency "bins" in use would be a good indicator. My 61.9dB line (4.53km) seldom used bins above 150, so didn't get anywhere near the additional ADSL2+ bins, and achieved highest sync and data rates by forcing/selecting ADSL2*. ADSL2+ was next to unusable on my line, due to errors causing repeats and line drops.
Phil
* I was only able to "compare" with 20CN ADSL1 as I could not get ADSL1 to work when moved to 21CN - it would repeatedly appear to sync (based on lights) and then immediately drop the connection
Using a TP-Link Archer VR600 modem-router.
Re: Stuck on G.DMT?
14-10-2014 6:19 PM
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Re: Stuck on G.DMT?
14-10-2014 11:36 PM
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I think it would be worth giving ADSL2 a try as I never had any major issues when I was on it before but there is something to be said for stability over speed. I guess it really is a case of suck it and see! Do I need to wait for a mod here to pick it up? or chuck a ticket their way?
Many thanks for all the useful replies so far. Great community
Re: Stuck on G.DMT?
15-10-2014 1:02 AM
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Hey and I see we all forgot to say welcome to the forum
Re: Stuck on G.DMT?
20-10-2014 9:26 AM
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I've had a glance over this for you and placed the right orders to move you onto ADSL2+. The orders should complete within 24 working hours.
I hope this helps but if you have any more bother with this get back to us.
Re: Stuck on G.DMT?
24-10-2014 8:50 PM
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