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Easy enough to see if the electrics is having an effect monitor the SNR for a few hours and see if it straws from the 3dB figure at all.
The 30% less than line speed, is NOT referring to throughput, but rather line sync if memory serves me right. The throughput is allowed to go a lot lower, if memory is serving me right.
If the problem is contention, which is what would cause the speed to drop in a normal situation you would usually find it performed well between about midnight and 9am. If it is consistently 11Mbps and have ruled out your PC by checking on another connection of similar speeds, then soe mis-configuration in the BT Wholesale network seems most likely.
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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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Unlikely but it could be lots of errors on the line as already mentioned. Use RouterStats, for example, to monitor SNRM over a period. See link: http://www.vwlowen.co.uk/internet/files.htm
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I have a Netgear DG834 modem Which DG834?
You may be able to use Telnet on it, see here Netgear DG834/DG834G, to get its full router stats incl. error counts which people here have expressed interest in.
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 19 Meg WBC
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Just to confirm, are you performing the tests over a wired ethernet connection to the router with any wireless on the PC switched off?
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Just in case your node is busy when you happen to be testing (unlikely to be happening consistently though) you can view the Freeola/Entanet WBC node usage here. All nice and quiet as I write this.
Shame if Freeola did say they couldn't help - the Freeola rep views this forum so hopefully he will be along to comment 
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Faraday WBC node has been having a few issues of late, but don't think this is linked
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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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Agreed - that was only for the one afternoon.
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The 30% less than line speed, is NOT referring to throughput, but rather line sync if memory serves me right. The throughput is allowed to go a lot lower, if memory is serving me right. I'm with you on that, the throughput is the lower limit shown on BT speedtests like 600k on a 7150 IP profile.
--
Phil
MaxDSL - goes as fast as it can and doesn't read the line checker first.
MaxDSL diagnostics
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Unless I'm again sadly out of date in terms of information, 11mb out of 17mb would basically be a breach of the lower threshold which by ISP and Ofcom standards I believe is 30% of the rated speed for the line. I think you're talking bout the FTR which is a 30% drop in sync speed not in throughput.
--
Phil
MaxDSL - goes as fast as it can and doesn't read the line checker first.
MaxDSL diagnostics
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Have seen it appear once or twice more, but shorter durations it seems
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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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