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Standard User GeoffB
(experienced) Fri 10-Feb-12 09:47:40
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Cold weather and Infinity?


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In the first cold snap since I got Infinity my speeds have dropped to <25Mbps irrespective of the time of day (via Ethernet about 0.5 metre from lappy, not wireless). I was getting >32Mbps consistently last week. Any evidence that temperature can affect broadband speeds in the way Infinity delivers?

Dell Studio 15 with Win7 64bit and 4GB RAM
IE9 and Live Mail
BT Infinity
Standard User lee111s
(learned) Fri 10-Feb-12 10:24:52
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Re: Cold weather and Infinity?


[re: GeoffB] [link to this post]
 
Temperature shouldn't make a difference. If it's been wet recently where you are then a wet joint could be causing it. Or if a joint is wet then freezes it would create a gap in the joint which could affect the speed
Standard User G3UZF
(committed) Fri 10-Feb-12 10:46:15
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Re: Cold weather and Infinity?


[re: GeoffB] [link to this post]
 
I can't imagine a mechanism whereby the cold would affect an Infinity connection. I don't know how much heat is dissipated inside the Cabinet (it has fans so there must be some to get rid of), so it should be nice and warm inside. If some of the electronics is on the edge, I suppose it might pose a problem, but it's usually heat and not cold that electronics dislikes (eg, the vdsl Modem problem).

I have noticed some recent variation in speed, mine dropping to around 25Mbps from a usually stable and consistant 32Mbps.

As I use a tool similar to tbbMeter to monitor my instantaneous connection speed, I have noticed that its display gets spikey from time to time. If you do a test involving a large transfer of data (like the BT Speed Test) the spikes get averaged out.

However, it you use a short test and you hit some spikes, then a lower speed gets reported.

This tester is a short one and if you run it several times in quick sucession you may see quite a variation in speeds being reported. http://www.speedtest.bbmax.co.uk/

Might be something to consider.

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Standard User MHC
(legend) Fri 10-Feb-12 10:50:04
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Re: Cold weather and Infinity?


[re: GeoffB] [link to this post]
 
Should not make much of a difference ... that said, I have noticed a marginal improvement in te speed of mine - the opposite of yours!

The cabinets will run cooler - but that should not have any adverse effect. If anyone can see a VDSL and standard cabinet in close proximity, is there snow remaining on either?





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


M H C


taurus excreta cerebrum vincit
Standard User ad_winkie
(newbie) Fri 10-Feb-12 10:57:07
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Re: Cold weather and Infinity?


[re: GeoffB] [link to this post]
 
I have noticed the same thing. My BT Infinity line has gone from a lovely stable 36Mbps to anything form 1.5 to about 28. I have tried thinkbroadband, speedtest.net,bttester and broadband watchdog. All measure the same upload speed but the download speeds are all over the place. It is not just an artifact of the testers. I am experiencing drop outs when trying to watch programmes on BBC iplayer. There is a real problem somewhere.
Standard User RobFlet
(committed) Fri 10-Feb-12 13:13:36
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Re: Cold weather and Infinity?


[re: GeoffB] [link to this post]
 
Hey,

If you look at these pages

http://community.bt.com/t5/BT-Infinity/bd-p/BTInfinity

you'll see loads of people (including me) have had problems with Infinity dropping down to under a meg download, but upload staying solid. Also, routes to BBC and also Thomas Cook seem broken at times. Also people are seeing very high pings.

Seems there are some serious routing problems somewhere on the BT Network, and we as Infinity users seem to be getting the brunt of it.

That said, the problem which seemed to affect me got sorted and I am back to 37.5 megs over ethernet again.

Once the problem had been sorted I had to log into the HomeHub and disconnect the broadband and reconnect. I got a new and very different IP address, and that seemed to sort it. It does seem that how much you are affected depends on which IP range you land in. Currently on 86.168.***.*** and this equates to being in Durham (but I am in York)

Others have found that cycling the Hub to get different IP's sometimes helps get a good speed. [Don't cycle the modem too many times else the exchange will think there's a problem and lower your IP Profile].

Rob

1999 Freeserve Dial up --> Freeserve Anytime ---> 2005 Wanadoo 512k BB ---> Jul 2009 Orange up 8 Megs(hah!) --> Nov 2009 O2 LLU -> Nov 2011 BT Infinity( getting 37.5 megs now on ethernet)

Yamaha AW16G user
Red5Audio Microphones
Standard User ad_winkie
(newbie) Fri 10-Feb-12 17:33:39
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Re: Cold weather and Infinity?


[re: ad_winkie] [link to this post]
 
In reply to a post by ad_winkie:
I have noticed the same thing. My BT Infinity line has gone from a lovely stable 36Mbps to anything form 1.5 to about 28. I have tried thinkbroadband, speedtest.net,bttester and broadband watchdog. All measure the same upload speed but the download speeds are all over the place. It is not just an artifact of the testers. I am experiencing drop outs when trying to watch programmes on BBC iplayer. There is a real problem somewhere.

Here we go again. Evening is hear and the temperature has fallen to -2 and the speeds are falling apart again having about 28Mbps all day ( still not good enough since I know my line is good for 36). I am becoming more convinced that there is a temperature effect
Standard User MHC
(legend) Fri 10-Feb-12 17:48:22
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Re: Cold weather and Infinity?


[re: ad_winkie] [link to this post]
 
Still fine here ... speeds as good as they have been all day and checked using BT, BT Beta, TBB and speedtest.net. Depending on the quirks of the various testers 35500 - 38600 or 35.5 - 38.8 but importantly they are all consistent.





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


M H C


taurus excreta cerebrum vincit
Standard User RobFlet
(committed) Fri 10-Feb-12 17:52:13
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Re: Cold weather and Infinity?


[re: ad_winkie] [link to this post]
 
Just tested mine and it's as good as it was this morning, giving me my full speed (on my wireless I get 20 down and 8.8 up, which I know will translate to 37 down on wired - always does!)

Kids are home, so there's many more on the net.

Have you tried stopping and starting the homehub (not the modem), to see if that's any better? Worth a try, if nothing else?

But, I suppose it's possible there's a duff joint somewhere which is responding to the change of temperature. But, finding that is going to be nigh on impossible.

Best log the speed changes over the day (and temps), and remember that BT will only accept WIRED tests to their speedtester as valid speed indication info.

Cheers,

Rob

1999 Freeserve Dial up --> Freeserve Anytime ---> 2005 Wanadoo 512k BB ---> Jul 2009 Orange up 8 Megs(hah!) --> Nov 2009 O2 LLU -> Nov 2011 BT Infinity( getting 37.5 megs now on ethernet)

Yamaha AW16G user
Red5Audio Microphones

FujiFilm HS-10 User

Edited by RobFlet (Fri 10-Feb-12 17:53:49)

Standard User Alnath
(fountain of knowledge) Sat 11-Feb-12 00:00:30
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Re: Cold weather and Infinity?


[re: GeoffB] [link to this post]
 
The cold would make your line faster not slower due to the copper contracting but given the copper involved you probably wouldnt notice a difference. in the "good old days" my winter ADSL sync was just over half a Mbit more than my summer sync but that involved over 3.5km of copper.
Standard User RobertoS
(sensei) Sat 11-Feb-12 00:17:31
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Re: Cold weather and Infinity?


[re: Alnath] [link to this post]
 
Electric current flows on the outer layer of copper. So contraction due to low temperaure may shorten it, but the reduction in circumference could increase the resistance. ie increase the attenuation.

My broadband basic info/help site - www.robertos.me.uk
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"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User MHC
(legend) Sun 12-Feb-12 01:59:28
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Re: Cold weather and Infinity?


[re: RobertoS] [link to this post]
 
But the conductivity of copper changes as te temperature drops ... conductivity improves which is effectively the same as the resistance dropping.





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


M H C


taurus excreta cerebrum vincit
Standard User RobertoS
(sensei) Sun 12-Feb-12 09:32:27
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Re: Cold weather and Infinity?


[re: MHC] [link to this post]
 
In reply to a post by MHC:
But the conductivity of copper changes as te temperature drops ... conductivity improves which is effectively the same as the resistance dropping.
Hehe. "Super". tongue.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User Bald_Eagle1
(member) Sun 12-Feb-12 14:03:49
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Re: Cold weather and Infinity?


[re: RobertoS] [link to this post]
 
My currently poor connection has also improved (slightly) as the weather has become colder.

I hope that doesn't just mean that it will be completely useless next summer (rather like it was for most of last summer), if you could actually call it summer.
Standard User Alnath
(fountain of knowledge) Mon 13-Feb-12 14:18:36
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Re: Cold weather and Infinity?


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
Electric current flows on the outer layer of copper. So contraction due to low temperaure may shorten it, but the reduction in circumference could increase the resistance. ie increase the attenuation.


Well i guess i was just one lucky chicken then cos my attenuation was always a good 3db or 4db to the better in the winter depending on how cold it got. Summer attenuation was low 50s, winter attenuation high 40s
Standard User RobertoS
(sensei) Mon 13-Feb-12 16:06:28
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Re: Cold weather and Infinity?


[re: Alnath] [link to this post]
 
smile
I think it unlikely such an effect is anything to do with the temperature of the copper. If it were it would be a well-known phenomen, but in general peoples' attenuations never vary by more than 1dB unless there is a problem somewhere, or they change router - that can affect the reported value by several dB.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - Plusnet Value Fibre.
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User Alnath
(fountain of knowledge) Tue 14-Feb-12 16:23:35
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Re: Cold weather and Infinity?


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
smile
I think it unlikely such an effect is anything to do with the temperature of the copper. If it were it would be a well-known phenomen, but in general peoples' attenuations never vary by more than 1dB unless there is a problem somewhere, or they change router - that can affect the reported value by several dB.


Well it happend every winter for 8 years, i am not what you would call a noob and i know full well about chaning routers etc. I made sure when a router change came it was to one with a broadcom chipset, these always without fail gave me a lower attenuation and around 700kbps extra sync. Which on a 3.5km+ line length is significant.
Standard User RobertoS
(sensei) Tue 14-Feb-12 16:56:28
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Re: Cold weather and Infinity?


[re: Alnath] [link to this post]
 
smile
Sorry, I could have said more.

What I meant was there are many joints, chambers or whatever in the line between you and the exchange. Temperature could very well be affecting something dodgy in that chain. May even be some aluminium, and I have no idea of the temperature effects on that.

I just don't think that the effect on the copper itself is likely to be significant. I don't dispute you have something bad going on and that temperature seems to play a part. Or at least something to do with the ambient climate.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - Plusnet Value Fibre.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
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