ADSL Speed Calculations

The speeds that you can expect from your ADSL service are governed by many factors, including;

Type of telephone cabling in street
Distance from telephone exchange
Cabling at your home
Equipment at your end - modem, filter, surgeboards etc
& many more things

However we can work out a reasonable estimate of the speeds that you can expect by getting some data from your modem.

The Information we need is

Line Attenuation
& Noise Margin

In a Netcomm NB6 this information is found under Status & then DSL Line
Your Modem should give you this information somewhere - check the userguide if you can't find it.

The graph below gives you an approximate idea of the speeds you can expect, given the Line Attenuation information.

You can also find some more valuable info from these off site links

Calculate your Sync Speed - http://whirlpool.net.au/wiki/?tag=find_sync

Calculate your ADSL 2 Speed - http://whirlpool.net.au/wiki/?a=wiki&tag=DSLAM_speeds

Speed Calculator - http://fremnet.net/article/216/adsl-theoretical-speed-calculator

Please remember all of these will give you a reasonably good idea of what to expect, but may vary in their accuracy. Locall Australis cannot take any responsibility for information from these sources.