This article outlines what you can expect from SNR and Attenuation figures from ADSL modems. The tables below should be used to assist you in troubleshooting ADSL quality issues – even service drop-outs.
Attenuation is the loss of signal in a return trip between your ADSL modem and the exchange.
Attenuation | Expectations |
10 | Extremely Good |
20 | Very Good |
30 | Good |
40 | Bad |
50 | Very Bad |
60 | Extremely Bad |
The Signal to Noise ratio is a measurement of how much noise there is on the ADSL line.
SNR | Result |
6 | Very bad |
7 | Bad |
10 | OK |
20 | Good |
30 | Very Good |