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Standard User GonePostal
(learned) Sun 10-Aug-14 09:36:01
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IP Profile


[link to this post]
 
I live at the end of a long but stable bit of copper on what was previously called a Market 1 BT exchange. Until yesterday my default SNR appeared to be 6 and I had been synced at 3072 since 24th. June. In the early hours of yesterday morning it looks like my default SNR was suddenly reset to 9 and the sync speed dropped to 2528.

In previous times when this sort of thing happened it was possible to ring the Helpdesk and they could start a profile re-train from their console. I was told yesterday that under the Talk Talk regime, I would have to produce evidence from 3 or 4 BT Wholesale speed tests after which the agent would escalate the problem to their people who dealt with BT. BT would examine the test results and if they thought it appropriate start a re-train.

This seems a hugely complex procedure with the ever-present risk that BT will fall back to their standard "You are connected at over 2Mb so there is no problem" script and do nothing.

Have I been informed correctly and if not, does anyone know what magic words I need to utter to the Helpdesk to arrange a re-train?
Administrator MrSaffron
(staff) Sun 10-Aug-14 10:56:44
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Re: IP Profile


[re: GonePostal] [link to this post]
 
It is jump the hoops or wait for the DLM to see the stability over time and let you have a 6db margin again

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User GonePostal
(learned) Sun 10-Aug-14 11:01:07
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Re: IP Profile


[re: MrSaffron] [link to this post]
 
Mr Saffron

Thanks (although I can't say the advice gives me encouragement)!

We are due FTTC imminently (cabinet installed and cabled in so we are just waiting for a go-live date). I guess it is sit tight and wait until we have gone live and then find a new ISP that can us a service on the FTTC.


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Standard User brandscill
(committed) Sun 10-Aug-14 13:52:41
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Re: IP Profile


[re: GonePostal] [link to this post]
 
You'll need to wait for your SNR to drop as the line remains stable. Hopefully with the stable line your sync speed will increase, assuming this is ADSL and not ADSL2 3-5 days and the IP profile should adjust automatically. Only concern is, now the PO use Talk Talk for their network their default initial SNR is 9!

What exchange are you on?

BT ADSL 4.7Mbps (Actual)
Standard User GonePostal
(learned) Sun 10-Aug-14 14:13:15
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Re: IP Profile


[re: brandscill] [link to this post]
 
ADSL as far as I know.

NEEN (Embleton).
Standard User brandscill
(committed) Mon 11-Aug-14 21:28:24
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Re: IP Profile


[re: GonePostal] [link to this post]
 
Give it till the end of the week. What router are you using?

(Currently retraining my BT line after a drop out)

BT ADSL 4.7Mbps (Actual)
Standard User GonePostal
(learned) Mon 11-Aug-14 21:45:56
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Re: IP Profile


[re: brandscill] [link to this post]
 
2-Wire 2701 so I can't Telnet it to reset the SNR.
Standard User brandscill
(committed) Tue 12-Aug-14 18:46:58
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Re: IP Profile


[re: GonePostal] [link to this post]
 
Same here with my Technicolour. Waiting game it is then!

BT ADSL 4.7Mbps (Actual)
Standard User brandscill
(committed) Tue 19-Aug-14 14:39:12
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Re: IP Profile


[re: GonePostal] [link to this post]
 
Any joy?

BT ADSL 4.7Mbps (Actual)
Standard User GonePostal
(learned) Tue 19-Aug-14 16:42:12
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Re: IP Profile


[re: brandscill] [link to this post]
 
No change. Been sync'd at 2528 for over 10 days now. Stats from the router show:

Current DSL Connection:
Down Up
Rate: 2528 kbs 448 kbs
Max Rate: 2528 kbs 628 kbs
Noise Margin: 9.0 dB 11.0 dB
Attenuation: 60.5 dB 31.5 dB
Output Power: 17.7 dBm 12.3 dBm

Protocol: G.DMT Annex A
Channel: Interleaved
DSLAM Vendor Information Country: {46336} Vendor: {TSTC} Specific: {0 }
ATM PVC: 0/38

Rate Cap: 2528 kbs
Attenuation @ 300kHz: 60.5 dB
Uncanceled Echo: -13.6 dB Ok
VCXO Frequency Offset: 10.4 ppm Ok
Final Receive Gain: 34.5 dB Ok
Excessive Impulse Noise: 0 Ok
Traffic Statistics
IP Traffic Bytes Packets Errors %
Transmit: 569452246 5 0 0
Receive: 2294358491 9811037 0 0

ATM Traffic Cells Errors %
Transmit: 25734751 0 0
Receive: 234084867 0 0
DSL Link Errors

Collected for 10Days7:36:42
Since Current Current Time Since
Reset 24-hr int. 15-min int. Last Event
ATM
Last Event
Cell Header Errors 10103 161 3 0:05:53
Loss of cell Delineation 3703 2 0 1:08:25

DSL
Link Retrains: 0 0 0 0:00:00
DSL Training Errors: 0 0 0 0:00:00
Training Timeouts: 0 0 0 0:00:00
Loss of Framing Failures: 0 0 0 0:00:00
Loss of Signal Failures: 0 0 0 0:00:00
Loss of Power Failures: 0 0 0 0:00:00
Loss of Margin Failures: 0 0 0 0:00:00
Cum. Seconds w/Errors: 4842 108 3 0:05:53
Cum. Sec. w/Severe Errors: 52 0 0 8:37:59
Corrected Blocks: 140173 1078 11 0:01:43
Uncorrectable Blocks: 10896 180 3 0:05:53
DSL Unavailable Seconds: 32 0 0 10Days7:36:09

I think they indicate a pretty stable line. However, I can't be bothered to fight my way through the Post Office Help Desk so I'm sitting on things until we get the FTTC cabinet enabled.

Edited by GonePostal (Tue 19-Aug-14 16:43:56)

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