They certainly are!
Bus Slogan Generator Have fun.
Recap: the deal is to purchase a DG834GT router, install some custom firmware and tweak the Signal to Noise Ratio (SNR) percentage to as low as possible, thus gaining a higher ADSL sync rate, IP Profile and actual throughput.
See this thinkbroadband FAQ article regarding actual connection speed vs IP profile.
Signal to Noise RatioThe down side is that as the connection speed increases the line stability decreases. The art is in trading stability for speed - achieving a higher throughput whilst keeping the line stable.
Put simply, Signal to Noise Ratio (SNR) compares the level of a desired signal (in my case the ADSL signal) to the level of background noise on the telephone line. My line is set at the exchange to provide a 15dB signal to noise ratio. Therefore, when handshaking with the exchange, my router will always synchronise at a speed that will ensure that there is a 15dB SNR.
This is achieved at the expense of connection speed.
However with a SNR adjustment at the router end, It is possible to override the exchange's preferred SNR which in turn allows the router to synchronise the broadband connection at a faster rate, gaining a higher IP Profile and higher throughput.
Broadcom-based routers can be tweaked to change the target noise margin set in the exchange, using the adslctl command in telnet. With Netgear routers, the DGTeam firmware makes it possible to perform the same tweak in the web interface. But in either case the tweak is limited to about - 5.5 dB in the downward direction, so if your target noise margin has been increased to 15 dB you won't be able to get it down to less than about 9.5 dB using documented methods. Note that, without the DGTeam firmware, this tweak doesn't survive a re-boot. So if you power down the router or re-boot you'll have to enter the command again.Roseway - Kitz forums.
The normal form of the adslctl noise margin tweak command is
adslctl configure --snr N
|Change you want in SNR||Value for N|
|No change/reset to default value||100|
|Lower by 1.5 dB||75|
|Lower by 3 dB||50|
|Lower by 4.5 dB||25|
|Lower by 6 dB||65550*|
|Lower by 7.5 dB||65525*|
|Lower by 9 dB||65500*|
|Lower by 10.5 dB||65475*|
|Lower by 12 dB||65450*|
|Lower by 13.5 dB||65425*|
|Lower by 15 dB||65400*|