Value on 21CN

[#1]

My exchange was enabled a while ago but still on 20CN - not complaining as current uptime is 66 days and 5500 kbps profile is perfectly acceptable at about 3km from exchange.

[#2]

just found where I was trying to find out about Value and 21 CN  http://community.plus.net/forum/index.php/topic,85143.16.html

[#3]

It looks as though the change happened at about 1 o'clock this morning.
I don't know about the default noise margin as it is currently showing 12.6dB at 3264kbps which is a much higher speed than usual for that default noise margin and a 1.0am resync
The router resynched and the attenuation figures have changed
Before
Downstream 52dB Upstream 23.5dB
After
Downstream 50dB Upstream 21.5dB
Perhaps someone can explain that
Edit - DMT graph has changed and I am not sure how going to 21CN could do that unless the change included moving to a different line card in the exchange
Router log looks a bit odd as well (it doesn't run on BST hence the 1 hour error)

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Sun, 2010-06-27 23:52:41 - LCP down. Sun, 2010-06-27 23:53:23 - Initialize LCP. Sun, 2010-06-27 23:53:23 - LCP is allowed to come up. Sun, 2010-06-27 23:53:24 - CHAP authentication success Sun, 2010-06-27 23:58:54 - LCP down. Sun, 2010-06-27 23:59:11 - Initialize LCP. Sun, 2010-06-27 23:59:11 - LCP is allowed to come up. Sun, 2010-06-27 23:59:12 - CHAP authentication success Mon, 2010-06-28 00:58:32 - LCP down. Mon, 2010-06-28 00:59:04 - Initialize LCP. Mon, 2010-06-28 00:59:04 - LCP is allowed to come up. Mon, 2010-06-28 00:59:05 - CHAP authentication success

2nd Edit - can't run the BT speedtest either

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System Error The Performance Tester is currently unable to run a speed test for your broadband connection. Please try again shortly, however if this problem persists, raise the issue with your service provider.

[#4]

FAO MisterW,
I've so far been unable to trace your account, do you have a ticket ID at all please?

[#5]

Adam,
Ticket ID is 33969955, thanks. I realise that eventually I'm going to have to move to 21CN but at the moment I'd rather wait until we get some better control over the DLM.
Jim,

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The router resynched and the attenuation figures have changed Before Downstream 52dB Upstream 23.5dB After Downstream 50dB Upstream 21.5dB Perhaps someone can explain that Edit - DMT graph has changed and I am not sure how going to 21CN could do that unless the change included moving to a different line card in the exchange

AFAIK you will have been moved to a new line card. Moving to 21CN ( even on ADSL1 ) still means moving your line from a DSLAM card to a MSAN card. Good news that the attenuation figures seems to have dropped though , one would perhaps expect a slight increase in attenuation as I understand that the MSAN's are further from the frame than the DSLAM.
Keep us posted on results of changeover, please.

[#6]

Update - did a manual resync this morning and my default noise margin has been increased to 12dB from 9dB as part of the changeover - speed now 3488kbps (3000 IP profile) and the noise margin overnight didn't drop below 11.4dB
As I am in the ten day training period I assume I shouldn't adjust the default noise margin

[#7]

Did your modulation change from G.992.1 annex A, Oldjim?
Not seen any sign of moving to 21CN ( I'm also on Value) with current 68 days uptime.

[#8]

Not sure how to check as it is set to auto(multimode) on my Netgear DG834G v4

[#9]

Just run the BT speedtest with this result

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Download speed achieved during the test was - 2305 Kbps For your connection, the acceptable range of speeds is 1000-2742 Kbps. Additional Information: Assured Rate IP profile on your line is - 2742 Kbps

What happened to the IP profile and the connection speed which is 3488 kbps (was 3264 kbps until a manual resync this morning)

[#10]

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Not sure how to check as it is set to auto(multimode) on my Netgear DG834G v4

Doesn't  telneting in and using the 'adslctl info --show' command give the current mode Jim ?

[#11]

FYI MisterW,
Your order to regrade the line to 21CN has now been cancelled.

[#12]

Thanks Adam.

[#13]

I am not sure that this gives the answer but it appears to say I am not on ADSL2

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Mode:                  G.DMT Channel:                Interleave Trellis:                ON Line Status:            No Defect Training Status:        Showtime                 Down            Up SNR (dB):      11.9            23.0 Attn(dB):      51.0            21.5 Pwr(dBm):      18.8            12.6 Max(Kbps):      3776            1176 Rate (Kbps):    3488            448                         G.dmt framing K:              110(0)          15 R:              16              16 S:              2              8 😧              16              4                         ADSL2 framing MSGc:          1              1 B:              75              15 M:              2              8 T:              1              1 R:              16              16 S:              2.2105          9.0000 L:              608            128 😧              16              4

Just noticed the attenuation has increased to 51dB and there was a massive spike in upstream and downstream errors
Edit - looks as though that was a side effect of the telnet usage on routerstats as the total errors reported by the router are negligible

[#14]

Correct Jim , you are on ADSL1

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Mode:                  G.DMT

but then again, why would you expect to be on ADSL2 , your account is Value isnt it ?, therefore you've only been moved to ADSL1 on 21CN.

[#15]

I would have thought that Oldjim would expect to be on ADSL2 so that Plusnet can get the cost saving of moving the account to 21CN, BUT to have his Value account line profile limited to a maximum of 8000Kbps (as if it were still on an ADSL1 connection).