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kasg
(fountain of knowledge) Thu 30-Jul-15 10:01:09

Is it possible to get banding removed?

[link to this post]

I had a resync on 28-Jul at 66999/19999 but my attainable is now around 76000. I have been on 66999 before with higher attainable figures so it looks very much as though my connection has been banded. Will this ever go away of its own accord or does it have to be reset? I have had G.INP enabled for some time now.

This followed a long period where my sync and attainable had been around 64-65000. The latest resync seems to have coincided with a change in the DSLAM chipset version number from 0xa44f to 0xa459. Happy to post any stats if it helps. Thanks.

Kevin

plusnet Unlimited Fibre - sync approx 65000/20000 at 450m - BQM
Using OpenDNS
Domains and web hosting with TSOHOST

MrSaffron
(staff) Thu 30-Jul-15 10:13:51

Re: Is it possible to get banding removed?

[re: kasg] [link to this post]

Without seeing the full stats and doing a per bin calculation it is feasible that the attainable figure may not be higher due to banding, but an over optimistic estimate of possible sync, i.e. lower target SNR than DSLAM imposes.

Or at last resync at 66999 was perfect, but then a few seconds later noise reduced slightly and as modems don't resync to chase the improvement you now have spare in the attainable.

As its FTTC getting things reset is harder and usually needs a fault to have been raised by the provider and given the minor difference I cannot see an ISP entertaining it.

Andrew Ferguson, [email protected]
www.thinkbroadband.com
Personal website including useful broadband snippets and maps

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.

kasg
(knowledge is power) Thu 30-Jul-15 10:33:08

Re: Is it possible to get banding removed?

[re: MrSaffron] [link to this post]

OK, thanks, here are the short stats in case it helps:

Text

xdslcmd: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 1
Last initialization procedure status:   0Max:    Upstream rate = 23707 Kbps, Downstream rate = 76200 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 66999 KbpsBearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Discovery Phase (Initial) Band PlanUS: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2782)DS: (33,859) (1216,1961) (2793,3970)
      VDSL Port Details               Upstream               DownsreamAttainable Net Data Rate:           23707 kbps              76200 kbps
Actual Aggregate Tx Power:             6.9 dBm               14.0 dBm===================================================================================
      VDSL Band Status    U0       U1      U2      U3      U4      D1      D2      D3  Line Attenuation(dB):  4.4     21.3    32.2     N/A     N/A    11.2    26.6    41.2
Signal Attenuation(dB):  4.4     20.1    31.3     N/A     N/A    13.3    26.3    41.1        SNR Margin(dB):  13.1    13.2    13.6     N/A     N/A    5.3     5.3      5.3
         TX Power(dBm): -3.4    -22.3    6.6      N/A     N/A    11.4    7.9      7.0

Kevin

plusnet Unlimited Fibre - sync approx 65000/20000 at 450m - BQM
Using OpenDNS
Domains and web hosting with TSOHOST

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