ADSL download/upload speed disparity

Hi,

I'm currently getting

Bandwidth Down/Up(kbps) 520 / 747

That means my upload bandwidth is greater than my download bandwidth.

The A in ADSL is asynchronous, but "normally", that means your download bandwidth is than the upload bandwidth.

Is there any technical explanation for why my router (or isp) is allowing/favouring my upload over my download?

Cheers, Buk.

Hi,
Can you post your router line stats (all of it) - http://www.kitz.co.uk/adsl/frogstats.php

and the full result/data from - http://speedtester.bt.com/

it will help.

Mac

If the attenuation is high > 60dB in this case, probably >63dB then the reason is that the upstream uses lower frequencies that cope with the distance better.

Alas you cannot swap them around for the long lines, as this causes chaos for everyone else.

In reply to a post by Anonymous:

Hi,

I'm currently getting

Bandwidth Down/Up(kbps) 520 / 747

That means my upload bandwidth is greater than my download bandwidth.

The A in ADSL is asynchronous

Asymmetric, actually http://en.wikipedia.org/wiki/Asymmetric_digital_subs...

Router stats:

ADSL State Show Time
Data Path Interleaved
Operation Mode ADSL2
Bandwidth Down/Up(kbps) 520 / 747
SNR Margin Down/Up(dB) 5.9 / 6.6
Attenuation Down/Up(dB) 60.0 / 32.8
Power Down/Up(dBm) 0.0 / 12.3
CRC Down/Up 0 / 65420
FEC Down/Up 17094 / 65516
HEC Down/Up 0 / 0

Speedtest stats:

Download Speed (Mbps): 0.45
Upload Speed (Mbps): 0.50
Ping Latency(ms): 490.50

I am a long way (6.7km) from my local exchange, but until quite recently I was regularly getting 2.5 to 3.0 Mbps. The gradually it started tailing off until I now find myself with the above abysmal connection.

"the reason is that the upstream uses lower frequencies that cope with the distance better."

Okay. That makes sense. Thanks.

Could you expand a little on "causes chaos for everyone else."?

Thanks, Buk.

"Asymmetric, actually"

Of course! Right though, wrong word.

If you swapped them around there would be terrible crosstalk problems, i.e. you would cause noise on all the other lines that run together in/out of the exchange.

Unplug all ADSL hardware filters too, and try a corded phone and dial 17070 and do the quiet line test, is the line almost silent, or full of pops and whistles