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Standard User nelix01
(member) Tue 09-Aug-11 19:43:12
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Maximum Line Rate


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I wonder if any of you knowledgeable gents can help me work out the maximum FTTC rate for my line?

I am currently getting anywhere around 36-37 Mbps Download and 6-8 Mbps Upload when tested on Speedtest.net. When tested on TBB the upload never exceeds 4Mbps.
It may seem like I am being picky, believe me I'm more than happy as was previously on a 1Mbps connection for the best part of 6 years.

The reason I ask is that the distance between me and the FTTC CAB is 112 metres (by footpath and passing all the BT chambers including the one at the front of my house)and I often see people quoting much further distances from the CAB but achieving full 40/10 connections.

Is there a problem that I should be investigating?

Standard User RobertoS
(sensei) Tue 09-Aug-11 19:53:33
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Re: Maximum Line Rate


[re: nelix01] [link to this post]
 
You should be getting 8Mbps+ upload. What does the BT Tester show? Please copy and paste thefull results as far down as the end of the upload figures.

Re the distance, just a minor point. You need the (cable) distance to your PCP cabinet, (as some people have found their connection to that starts off in the wrong direction!), plus the distance between that and the fibre cab, and that might wind around a bit.

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 Garyilka
(knowledge is power) Tue 09-Aug-11 19:56:22
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Re: Maximum Line Rate


[re: nelix01] [link to this post]
 
There have been other threads on the same subject. As I recall it's accepted that the TBB tester doesn't work well with fibre connections. If I test using TBB, the results are like a fiddlers elbow! The BT tester can be a bit erratric too. Speedtest.net seems to be very consistent........


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Standard User RobertoS
(sensei) Tue 09-Aug-11 19:59:35
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Re: Maximum Line Rate


[re: Garyilka] [link to this post]
 
In reply to a post by Garyilka:
Speedtest.net seems to be very consistent........
That's because it discards a fair proportion of slower samples during the test.

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 nelix01
(member) Tue 09-Aug-11 20:24:18
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Re: Maximum Line Rate


[re: RobertoS] [link to this post]
 
Robert,

There is 3 meters between the PCP and FTTC CAB. Speed test results are:

Download speedachieved during the test was - 34258 Kbps
For your connection, the acceptable range of speeds is 12000-36799 Kbps .
Additional Information: IP Profile for your line is -36799 Kbps

Upload speed achieved during the test was - 8201 Kbps
Additional Information: Upstream Rate IP profile on your line is - 10000 Kbps

Standard User Garyilka
(knowledge is power) Tue 09-Aug-11 20:29:48
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Re: Maximum Line Rate


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
In reply to a post by Garyilka:
Speedtest.net seems to be very consistent........
That's because it discards a fair proportion of slower samples during the test.

Maybe - I wouldn't know and don't really care. I use real downloads to judge my performance. The fact is that the OP was using the TBB speedtester which is erratic when testing fibre - as has been accepted on a number of occasions as I recall.
Standard User nelix01
(member) Wed 10-Aug-11 16:09:27
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Re: Maximum Line Rate


[re: Garyilka] [link to this post]
 
I was aware of issues on the TBB Tester when used on FTTC lines. Most of my tests are run on the BT Wholesale or Speedtest.net sites.

Standard User Zarjaz
(knowledge is power) Wed 10-Aug-11 18:54:02
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Re: Maximum Line Rate


[re: nelix01] [link to this post]
 
Top profile, seen on the BT Wholesale tester is 38717Kbps, if you see this, then you are getting full 40000Kbps sync. So it looks as though yours isn't getting full sync. If your line is as short as you say, it should most certainly be getting full sync. *Might* be something worth investigating.

Standard User nelix01
(member) Thu 11-Aug-11 09:51:34
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Re: Maximum Line Rate


[re: Zarjaz] [link to this post]
 
Zarjaz,

New build estate in a rural area with PCP at entrance. I am pretty sure that my line is no more than the 112 metres I have measured from this. Latest check on the Wholesale Tester shows a profile of 36799kbps.

What can I do to get this checked out?

Standard User Adsl24
(fountain of knowledge) Thu 11-Aug-11 10:20:35
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Re: Maximum Line Rate


[re: nelix01] [link to this post]
 
To be honest I can't see any problem. The maximum you will get throughput wise is 37Mb downstream and 8.5-9Mb upstream due to overheads and IP profiling. You are seeing very close this on a speedtest, so there is no way BT will look at that being a fault condition I'm afraid.

James
ADSL24 Broadband
http://adsl24.co.uk
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