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Standard User PKL
(newbie) Mon 16-Sep-13 17:36:57
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Where's the good old plusnet gone?


[link to this post]
 
Hello

Returning customer, originally signed up to PN back in 2005 before moving in with the (now) Mrs. Iím currently struggling with bandwidth and would greatly appreciate some advice if possible.

In a nutshell: moved house early 2012, our ISP was BT. Really struggled with bandwidth, generally less than 2mbps. Tried to resolve through BT for months and gave up. Sacked BT and switched to PN in July this year (yeah I know PN are owned by BT..) and generally achieving better speeds, but still lots of fluctuation and poor speed ~3mbps. Been testing the speed most days Iím at home with the ThinkBB test.

Estimated line speed for the house is 6-8mbps. Nearest exchange is less than 200m from the house, hence Iím struggling to understand why weíre getting such poor speeds. Even if the line from the exchange does come literally round the houses, itís still 1100m tops distance-wise.

Test machine is connected to the router with Ethernet. Router is on 24/7. Connection is generally stable, but just sluggish. Speed doesnít seem to be too badly affected at peak times. Just constantly rubbish! 20CN capacity at the exchange is flagged as amber. No other faults/outages being flagged.

Have tried to resolve through PN a couple of times now and had the line reset. Hereís the thing: during the training period speed is great Ė more than 6mbps. Then as soon as the training period ends it drops to ~3mbps. Iíve asked PN a straight question: Is our line speed being throttled/controlled? No straight answer.

PN insist that they need to send and engineer out to test the line. Iím concerned that thereís nothing wrong with the line Ė as proven with the training periods Ė and that Iíll be charged £60 for the engineer call out.

Here are test figures from the question thread:
Loop Loss: Up 11 / Down 18
SNR Margin: Up 24 / Down 23
Errored Seconds: 0 both
HEC errors: 0 both
Cell Count: Up 471659471 / Down 1512277412
Speed: Up 448 / Down 3808

Maximum Stable Rate (kbps): 8128
Mean time between retrains: 21553
Indicative line quality: A
Fault threshold rate: 6502
Mean time between errors upstream (seconds): 43106
Mean time between errors downstream: 86

WP profile: Generic speed 7150 No Time Out (estimate 7-8)
CLT: Pass
NIC: Pass
TAM: Pass
Next action: LTB but SNR far too high. Will reset and get customer to monitor
Standard User jelv
(knowledge is power) Mon 16-Sep-13 18:33:30
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Re: Where's the good old plusnet gone?


[re: PKL] [link to this post]
 
In reply to a post by PKL:
Iíve asked PN a straight question: Is our line speed being throttled/controlled? No straight answer.
By Plusnet? Absolutely not.

Your speed is being restricted because your router has synced with the exchange at a low speed and that is down to the exchange and/or your router.

Can you post your full statistics reported by the router immediately after a resync please.

jelv

Plusnet user since November 2001 - not sure for how much longer
Administrator MrSaffron
(staff) Mon 16-Sep-13 19:06:23
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Re: Where's the good old plusnet gone?


[re: PKL] [link to this post]
 
If the exchange has 21CN (ADSL2+ from BT Wholesale) then you can ask PlusNet to upcap the upload speeds to make uploading a bit faster for a start.

As for the line, without seeing the sequence of router steps from new and in particular how the line and modem is handling the line difficult to say much beyond you are going slow because of the high SNR margin. Restarting modem to show if this was a short blip or you have been banded will help.

Knowing which exchange will help a lot, as the advice needs to be tweaked accordingly.

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.


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Standard User PKL
(newbie) Mon 16-Sep-13 23:01:45
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Re: Where's the good old plusnet gone?


[re: MrSaffron] [link to this post]
 
Thanks for the feedback, reset late this evening and stats below.

Exchange is Churchill - SSCHU. 21CN is due to go live at some point in October.

Speed test post-reset: 2.9mbps (same as it has been for the last four days)

Uptime: 0 days, 0:07:28
DSL Type: ITU-T G.992.1
Bandwidth (Up/Down) [kbps/kbps]: 448 / 7.392
Data Transferred (Sent/Received) [MB/MB]: 2,13 / 13,07
Output Power (Up/Down) [dBm]: 11,9 / 19,9
Line Attenuation (Up/Down) [dB]: 12,0 / 18,5
SN Margin (Up/Down) [dB]: 25,0 / 8,9
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / ALCB
Loss of Framing (Local/Remote): 0 / -
Loss of Signal (Local/Remote): 0 / -
Loss of Power (Local/Remote): 0 / -
Loss of Link (Remote): -
Error Seconds (Local/Remote): 0 / -
FEC Errors (Up/Down): 0 / 18
CRC Errors (Up/Down): 0 / 0
HEC Errors (Up/Down): - / 0 / 0
Standard User XRaySpeX
(eat-sleep-adslguide) Mon 16-Sep-13 23:53:24
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Re: Where's the good old plusnet gone?


[re: PKL] [link to this post]
 
Now the Further Diagnostics (text only) from BT Wholesale Broadband Performance Test?

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC
Standard User jelv
(knowledge is power) Tue 17-Sep-13 08:42:55
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Re: Where's the good old plusnet gone?


[re: XRaySpeX] [link to this post]
 
Then when the IP Profile returns to a sensible value check the current line speed shown at https://portal.plus.net/my.html?action=data_transfer...

jelv

Plusnet user since November 2001 - not sure for how much longer
Administrator MrSaffron
(staff) Tue 17-Sep-13 11:15:55
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Re: Where's the good old plusnet gone?


[re: PKL] [link to this post]
 
Okay you are on the old system currently, where if you modem connects slowly the speed drops immediately, but once it connects again at a higher speed (and will usually need you to do that, as modems do not drop connection to reconnect faster automatically) the IP Profile setting can take up to 5 days to improve.

More often it is a period of 1 to 3 days, but might be as fast as an hour.

Once 21CN appears and PlusNet have migrated you to the new service (the move is not automatic) then this issue will go away

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User ian72
(knowledge is power) Tue 17-Sep-13 13:16:46
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Re: Where's the good old plusnet gone?


[re: MrSaffron] [link to this post]
 
Just to add that Plusnet of course have their own "IP Profile" that is set for a line and sometimes even when the BT one goes up the Plusnet one gets stuck. The Plusnet profile can be checked within the member centre on the Plusnet website.
Standard User ukhardy07
(fountain of knowledge) Tue 17-Sep-13 13:17:12
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Re: Where's the good old plusnet gone?


[re: MrSaffron] [link to this post]
 
Although the reason for it syncing lower in the first place will presumably not go away.

Is that something the ISP should investigate?
Administrator MrSaffron
(staff) Tue 17-Sep-13 14:20:36
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Re: Where's the good old plusnet gone?


[re: ukhardy07] [link to this post]
 
Looks to be interleaved (there are some FEC) so a lower sync than 8128 is not unusual in that case, even based on the low attenuation.

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
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