FTTC down/up speed asymmetry
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- Re: FTTC down/up speed asymmetry
FTTC down/up speed asymmetry
12-02-2015 9:34 PM
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What determines the download/upload ratio? I've noticed other FTTC
users get more balanced ratios. Examples:
http://community.plus.net/forum/index.php/topic,136655.msg1199032.html#msg1199032
- down/up ratio ~5:1
http://community.plus.net/forum/index.php/topic,136670.0.html
- 3:1
Plusnet help page:
http://www.plus.net/support/broadband/speed_guide/broadband_speeds.shtml
Fibre 'up to' 76Mb/s up, 19.5Mb/s down
- 4:1
Our speeds here reported by speedtest.net and speedtest.btwholesale.com
are around 8.96 down/0.38 up - a ratio of around 24:1
There's just over a mile of copper from the street cabinet which
explains the slow download speed, but what is stopping the upload from
being closer to 2Mbit?
Current package is Plusnet Unlimited Fibre
Re: FTTC down/up speed asymmetry
12-02-2015 9:55 PM
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Re: FTTC down/up speed asymmetry
13-02-2015 9:48 AM
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It could also be caused by poor filters; shouldn't be the case with a standard install and filtered faceplate, but ...
Or a mild case of star wiring, with some sort of extension coming off a junction box in the incoming feed before it reaches the master socket.
If you've got an unlocked modem a program such as dslstats will show the tones and might give more clue.
Re: FTTC down/up speed asymmetry
16-02-2015 10:25 AM
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Quote from: sjptd I think the upload tones are lower frequency than the download tones
It's a bit more compicated than that (assuming my spectrum is typical): red is downstream and green is upstream
Re: FTTC down/up speed asymmetry
16-02-2015 10:46 AM
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At any given moment in the universe many things happen. Coincidence is a matter of how close these events are in space, time and relationship.
Opinions expressed in forum posts are those of the poster, others may have different views.
Re: FTTC down/up speed asymmetry
16-02-2015 10:48 AM
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At any given moment in the universe many things happen. Coincidence is a matter of how close these events are in space, time and relationship.
Opinions expressed in forum posts are those of the poster, others may have different views.
Re: FTTC down/up speed asymmetry
16-02-2015 5:09 PM
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I had thought that the upload and download tones were now more overlapping than they used to be on ADSL, but a quick trip to DSLStats indicated that they were not.
I have now made another check, and see that my DSLStats was set up only to display a small proportion of all tones.
I have now moved the Compress/Expand slider and can see the full picture, and my graph is similar to w23's with three upload tone ranges.
Re: FTTC down/up speed asymmetry
16-02-2015 5:30 PM
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Re: FTTC down/up speed asymmetry
27-02-2015 4:08 PM
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Stoker, w23, sjptd - How are you generating those frequency charts?
I'm almost certain we've got a single copper pair back to the green box... but much of line is above ground, passes through trees and hedges, has probably been there since the 1970s and has been repaired and patched many times.
As far as I know, it's not possible to get much in the way of stats from the modem as it can't be accessed through the Plusnet supplied Thomson/Technicolor TG582n router.
-
...and download has jumped up to 11.4Mbps in the last week but upload is still around 0.39Mbps.
Very frustrating.
I was wondering if our DECT phones might be causing a problem, but they run at GHz frequencies, so it seems unlikely.
Re: FTTC down/up speed asymmetry
27-02-2015 5:05 PM
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At any given moment in the universe many things happen. Coincidence is a matter of how close these events are in space, time and relationship.
Opinions expressed in forum posts are those of the poster, others may have different views.
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