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Standard User amphion
(member) Sat 29-Oct-11 21:17:45
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Slow upstream speeds on full sync


[link to this post]
 
My FTTC Fibre Office (40/10) connection with Zen went live yesterday.

Everything went smoothly. The engineer informed me my line has obtained maximum sync (which isn't surprising as my cab is less than 100m away as the crow flies).

However, I've noticed my upstream speed is only about half of the sync speed (around 5Mb/s). Ive done several runs on BT's speedtester site and the result is consistent (I've tried rebooting the modem).

Strangely, on speedtest.net my line achieves an average of 7.7Mb/s upload.

All speed tests report the expected ~38Mb/s downstream.

Any ideas? Is the upstream likely to increase? I heard some people say there is a 10-day training period for new FTTC connections; although as I have full upstream sync I can't see this making any difference.

Thanks for any help/info

Here is the latest BT speedtester result:

Test1 comprises of two tests

1. Best Effort Test: -provides background information.

Download Speed
35604 Kbps

0 Kbps 38717 Kbps
Max Achievable Speed

> Download speedachieved during the test was - 35604 Kbps

For your connection, the acceptable range of speeds is 16000-38717 Kbps .
Additional Information:
IP Profile for your line is -38717 Kbps

2. Upstream Test: -provides background information.

Upload Speed
4719 Kbps

0 Kbps 10000 Kbps
Max Achievable Speed

>Upload speed achieved during the test was - 4719 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 10000 Kbps


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amphion
Standard User RobertoS
(sensei) Sat 29-Oct-11 22:36:00
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Re: Slow upstream speeds on full sync


[re: amphion] [link to this post]
 
In reply to a post by amphion:
(I've tried rebooting the modem).
What about the router?

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 amphion
(member) Sun 30-Oct-11 00:32:02
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Re: Slow upstream speeds on full sync


[re: RobertoS] [link to this post]
 
Yep, I've rebooted the router too (A Draytek Vigor 2820)

Some speedtest sites (e.g. speedtest.net, mybroadbandspeed.co.uk) consistently report the expected upstream speed (between 7 and 8 Mb/s) whereas thinkbroadband and BT's speedtester site consistently report around 4.5Mb/s. Who do I believe?

--

amphion


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Standard User J_Walsh
(fountain of knowledge) Sun 30-Oct-11 06:48:15
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Re: Slow upstream speeds on full sync


[re: amphion] [link to this post]
 
Other thank trying to max your upstream - Id take the speedtests as a guide only.

sky unlimited
Standard User jchamier
(knowledge is power) Sun 30-Oct-11 13:52:40
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Re: Slow upstream speeds on full sync


[re: amphion] [link to this post]
 
In reply to a post by amphion:
Yep, I've rebooted the router too (A Draytek Vigor 2820)


If you have a PC that can handle PPPoE (e.g. Win7, OS X etc) then perhaps try without the Draytek?

James - be* pro - on THFB - sync about 17.2mbps - BQM
Standard User Croftie
(member) Mon 31-Oct-11 01:27:22
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Re: Slow upstream speeds on full sync


[re: amphion] [link to this post]
 
In my testing, believe the first two over the second two. The thing to do, is measure at several sources and while measuring have the task manager open on the networking tab with the update priority set to high. Then you will have a visual representation of the amount of bandwidth being used and whether the different sources tally with each other.

Optionally you can also have a bandwidth monitor running which also has a real time graph showing bandwith usage just to confirm task manager and any other measurments tally.

A good alternative place to test upload is sendspace.com. A minimum of 100MB file is needed for the numerical speed estimate to show an accurate figgure but you can see pretty quickly from a real time bandwidth graph the upload is quickly saturated uploading to there.
Standard User WWWombat
(committed) Wed 02-Nov-11 16:39:35
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Re: Slow upstream speeds on full sync


[re: amphion] [link to this post]
 
In my tests, I've always found that speedtest.net gives me the most consistent results; upstream has been between 8.0 and 8.2Mbps, and I think this is pretty much the maximum you'll get.

Downstream used to be consistent at 33.5Mbps, but has just increased this week to 37.5Mbps. It looks like my cabinet has just gone to the new profile.

The BT Speedtester was always lower and less consistent - around 30-32Mbps down and 7Mbps up. I haven't run it enough with the new profile to gauge range & consistency yet, but it seems to be faster for downstream, ans still within the same range for upstream.
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