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| Thread ID: 68711 | 2006-05-08 11:47:00 | ADSL Line quality: some info that could help. | jermsie (6820) | Press F1 |
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| 453271 | 2006-05-08 11:47:00 | Here is a bit of info I think may benefit some users who find their ADSL is shoddy/crap/bung (ie: disconnects). I was looking for some info regarding this (line att,margin etc.) in the Australian Whirlpool forums whirlpool.net.au. (http://whirlpool.net.nz) If a thread like this has been posted before, well hoorah, I only seek to inform. I quote... The following may help. It is not my research but was posted some weeks ago by someone whom I neglected to identify. Noise Margin (AKA Signal to Noise Margin or Signal to Noise Ratio) Relative strength of the DSL signal to Noise ratio. The higher the number the better for this measurement. In some instances interleaving can help raise the noise margin to an acceptable level. 6dB or below is bad and will experience no synch or intermittent synch problems 7dB-10dB is fair but does not leave much room for variances in conditions 11dB-20dB is good with little or no synch problems* (but see note below) 20dB-28dB is excellent 29dB or above is outstanding * Note that there may be short term bursts of noise that may drop the margin, but due to the sampling time of the management utility in your modem, will not show up in the figures. Line Attenuation Measure of how much the signal has degraded between the DSLAM and the modem. This is largely a function of the distance from the exchange. The lower the dB the better for this measurement. 20dB and below is outstanding 20dB-30dB is excellent 30dB-40dB is very good 40dB-50dB is good 50dB-60dB is poor and may experience connectivity issues 60dB or above is bad and will experience connectivity issues DSL Rate ***/tx/rx/Rate The actual service data rate that your ISP has provisioned. Attainable Line Rate This is the maximum rate at which your modem can connect to the DSLAM if there was no service provisioning limiting the bandwidth. The higher the number the better. |
jermsie (6820) | ||
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