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ZERO difference in speed following conversion to ADSL2+

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Newbie
Posts: 9
Registered: ‎14-02-2010

ZERO difference in speed following conversion to ADSL2+

I recently went through the conversion process to ADSL2+ and the morning after the confimation of being enabled my router still showed ADSL.G DMT modulation.  Called Plusnet Support and after 3 days got them to set the modulation to ADSL2+ .
After another couple of weeks, numorous support calls,questions and fault checks , the line speed is exactly the same as when I was on ADSL1:
Estimated line speed: 6 - Checked on 2010-01-01 16:09:49 Current line speed: 4000
I've done everything that Plusnet Support have asked and they still cant get this profile reset.  My DSL router shows:
noise margin upstream: 0 db
output power downstream: 20 db
attenuation upstream: 17 db
noise margin downstream: 10 db
output power upstream: 12 db
attenuation downstream: 33 db
i'm 1 mile from my exchange and  I currently get about 4Mbps.  I hoped to get about 10Mbps downstream on 21CN. I'm really annoyed with Plusnet support at this point.  Any help is much appreciated.
Thanks
Cry
19 REPLIES 19
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Grafter
Posts: 1,503
Thanks: 1
Registered: ‎05-04-2007

Re: ZERO difference in speed following conversion to ADSL2+

Can you advise what make/model of modem/router you are using if possible please?
Without looking at your account, we will not normally have had to change any modulation on your ccount. Once on 21CN with the ADSL2+ option, there are no further options from our side to control ADSL/ADSL2/ADSL2+ setting, this becomes down to your modem/router.
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Community Veteran
Posts: 38,460
Thanks: 1,032
Fixes: 62
Registered: ‎15-06-2007

Re: ZERO difference in speed following conversion to ADSL2+

what are the speeds reported by your router
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Community Veteran
Posts: 6,736
Thanks: 13
Registered: ‎02-02-2008

Re: ZERO difference in speed following conversion to ADSL2+

Quote from: magicshoes
the line speed is exactly the same as when I was on ADSL1:

So what is it, you've not quoted it, either before or after?
As OldJim says, it's available along with the other stats from your router.
Also please say what make & model it is.
Your attenuation figure suggests that you SHOULD have had almost 8mbps on ADSL1 anyway so may well have a serious wiring problem.
(and ADSL2+ nearer 13mbps!)
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Newbie
Posts: 9
Registered: ‎14-02-2010

Re: ZERO difference in speed following conversion to ADSL2+

Hi - thanks for the replies.
My router model is a Zyxel Prestige 660hn-f1z.
My Download Speed has always ranged 4Mbps up to 5.5Mbps before and after being converted to the 21CN network.
So how do I get the Line profile reset - from the plusnet High Speed Broadband link in Members Centre, Connection setting it still says:
Telephone number:
    <withheld>
Phone exchange:
    <withheld>
Estimated line speed:
    6 - Checked on 2010-01-01 16:09:49
Current line speed:
    4000
i think my speed is being restricted in some way.
Thanks again.
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Community Veteran
Posts: 38,460
Thanks: 1,032
Fixes: 62
Registered: ‎15-06-2007

Re: ZERO difference in speed following conversion to ADSL2+

You still haven't provided the speed information from your router that we asked for.
Without that everything is pure guesswork
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Community Veteran
Posts: 6,736
Thanks: 13
Registered: ‎02-02-2008

Re: ZERO difference in speed following conversion to ADSL2+

Quote from: Oldjim
You still haven't provided the speed information from your router

Indeed, personally I'm losing interest.
The router is advertised as ADSL2+ so, IF SET UP CORRECTLY, should work fine in ADSL2+ mode.
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Newbie
Posts: 9
Registered: ‎14-02-2010

Re: ZERO difference in speed following conversion to ADSL2+

Ah sorry - i'll get the current Speed stats from my router tonight - sorry for the delay..
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Newbie
Posts: 9
Registered: ‎14-02-2010

Re: ZERO difference in speed following conversion to ADSL2+

managed to get this via CLI:
DSL STANDARD: ADSL2PLUS
UPSTREAMRATE: 448 kbps
DOWNSTREAMRATE: 5656 kbps
UPSTREAM ATTAINABLE RATE: 22675 kbps
DOWNSTREAM ATTAINABLE RATE: 6216 kbps
From the GUI you would just see
UPSTREAMRATE: 448 kbps
DOWNSTREAMRATE: 5656 kbps
So does my speed profile being set as below, mean anything?
Telephone number:
    <withheld>
Phone exchange:
    <withheld>
Estimated line speed:
    6 - Checked on 2010-01-01 16:09:49
Current line speed:
    4000
Thanks
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Community Veteran
Posts: 38,460
Thanks: 1,032
Fixes: 62
Registered: ‎15-06-2007

Re: ZERO difference in speed following conversion to ADSL2+

and what are the noise margin figures at present and what does the BT Speedtest give
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Newbie
Posts: 9
Registered: ‎14-02-2010

Re: ZERO difference in speed following conversion to ADSL2+

Just got a really bad BT Speedtester result, to be honest I normally get about 4000 Kbps, need to wait 1 hour before I can test again
BT SPEEDTESTER SHOWS:
----
Download speedachieved during the test was - 624 Kbps
For your connection, the acceptable range of speedsis 600-7150 Kbps.
Additional Information:
Your DSL Connection Rate :5656 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 4000 Kbps
The throughput of Best Efforts (BE) classes achieved during the test is - 30.93:22.92:46.15 (SBE:NBE:PBE)
These figures represent the ratio while sententiously passing Sub BE, Normal BE and Priority BE marked traffic.
---
Router DSL line stats:
noise margin upstream: 0 db
output power downstream: 20 db
attenuation upstream: 17 db
tone  0- 31: 00 00 00 00 24 55 66 77 77 77 77 77 66 65 43 20
tone  32- 63: 07 88 9a aa ab bb bb bb 0b bc bc bb bb bb cb bb
tone  64- 95: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone  96-127: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 128-159: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 160-191: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 192-223: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 224-255: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 256-287: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 288-319: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 320-351: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 352-383: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 384-415: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 416-447: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 448-479: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 480-511: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
noise margin downstream: 12 db
output power upstream: 12 db
attenuation downstream: 33 db
tone  0- 31: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone  32- 63: 06 78 99 9a aa aa bb ab bb bb bb bb bb bb bb ab
tone  64- 95: 0b bb bb ba ab ba ba aa aa ab ba ab ba aa aa aa
tone  96-127: aa a9 a9 9a 99 ba aa a9 a8 88 89 97 68 89 99 98
tone 128-159: 88 89 99 88 67 87 89 68 69 68 47 88 78 77 87 87
tone 160-191: 62 76 87 89 76 87 72 77 76 76 67 76 54 66 56 66
tone 192-223: 65 25 43 11 00 11 45 44 32 20 22 30 44 52 44 41
tone 224-255: 21 22 22 21 02 24 22 33 23 02 12 22 32 20 01 22
tone 256-287: 20 00 10 10 21 10 21 10 10 01 10 00 00 00 00 00
tone 288-319: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 320-351: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 352-383: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 384-415: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 416-447: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 448-479: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 480-511: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

thanks in advance for any further advice.
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Community Veteran
Posts: 38,460
Thanks: 1,032
Fixes: 62
Registered: ‎15-06-2007

Re: ZERO difference in speed following conversion to ADSL2+

The first thing is that you are being restricted by the IP Profile to 4000kbps which indicates a lowish sync at some time in the last three days.(between 4544 and 5119)
However the thing which is worrying is the upstream noise margin of 0dB which is either a reporting error or something is badly adrift. Given that your first report had the same value I would assume it is a reporting error
Can you plug the router into the test socket and advise the sync speeds, attenuation and noise margin
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Community Veteran
Posts: 6,736
Thanks: 13
Registered: ‎02-02-2008

Re: ZERO difference in speed following conversion to ADSL2+

The 12dB downstream noise margin also suggests repeated line problems.
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Newbie
Posts: 9
Registered: ‎14-02-2010

Re: ZERO difference in speed following conversion to ADSL2+

Ok guys, your onto something, plugged into the test socket (still having to use a ADSL Micro Filter)  i get from the router:
DSL Up 9624 kbps / 448 kbps
BT Speed test now says:
Download speedachieved during the test was - 1083 Kbps
For your connection, the acceptable range of speedsis 600-7150 Kbps.
Additional Information:
Your DSL Connection Rate :9624 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 4000 Kbps
Router DSL line stats show:
noise margin upstream: 30 db
output power downstream: 20 db
attenuation upstream: 0 db
tone  0- 31: 00 00 00 03 34 45 66 67 77 77 77 76 66 55 43 20
tone  32- 63: 07 78 99 9a aa aa aa ab ab aa aa ab ba aa ba aa
tone  64- 95: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone  96-127: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 128-159: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 160-191: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 192-223: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 224-255: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 256-287: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 288-319: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 320-351: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 352-383: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 384-415: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 416-447: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 448-479: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 480-511: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
noise margin downstream: 13 db
output power upstream: 12 db
attenuation downstream: 33 db
tone  0- 31: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone  32- 63: 07 78 99 9a aa aa aa ab ab aa aa ab aa ba aa aa
tone  64- 95: 0b aa ab aa aa aa aa bb aa aa bb aa ba aa aa a9
tone  96-127: 9a 9a a9 99 a9 aa 99 99 9a 9a 9a 99 9a 9a 99 a9
tone 128-159: 99 9a 99 98 89 99 99 a9 99 8a 99 99 99 98 99 99
tone 160-191: 87 98 98 89 88 99 98 98 98 88 98 99 99 99 89 99
tone 192-223: 97 99 98 88 89 88 98 98 87 77 97 98 89 88 76 88
tone 224-255: 85 68 88 88 77 78 78 78 78 58 67 87 87 76 44 67
tone 256-287: 75 47 86 76 85 74 66 65 42 26 55 53 24 25 45 37
tone 288-319: 55 47 56 55 66 66 54 54 55 65 66 64 54 66 64 55
tone 320-351: 55 54 44 44 22 23 22 04 44 13 03 23 32 32 34 44
tone 352-383: 43 42 32 42 40 41 42 42 23 22 22 42 44 24 44 44
tone 384-415: 44 22 44 44 23 22 34 42 22 22 22 22 22 12 22 12
tone 416-447: 12 22 22 12 22 20 22 11 12 20 22 22 21 10 00 00
tone 448-479: 11 10 01 11 00 00 00 01 11 00 01 10 00 00 00 00
tone 480-511: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

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Newbie
Posts: 9
Registered: ‎14-02-2010

Re: ZERO difference in speed following conversion to ADSL2+

changed ADSL splitter/microfilter connected to the test socket and get a further slight increase:
DSL Up 10359 kbps / 448 kbps
noise margin upstream: 30 db
output power downstream: 20 db
attenuation upstream: 17 db
noise margin downstream: 12 db
output power upstream: 12 db
attenuation downstream: 32 db
Sometimes this router does seem to report 0 on the noise margin upstream.
Think I'll need to sort out my internal wiring, leave the router up and running and see if the line profile improves, is this the right course of action.
Thank you very much for the help!
cheers