Here's a set of metrics for evaluating your ADSL line quality. I found this quoted on several DSL forums:
Attenuation Rates:
20bB. and below = Outstanding
20dB-30dB. = Excellent
30dB-40dB. = Very Good
40dB-50dB. = Good
50dB-60dB. = Poor and may experience connectivity issues
60dB. and above = Bad and will experience connectivity issues
For S/N Margin Readings:
6bB. or below = Bad and will experience no line synchronization or intermittent synchronization problems.
7dB-10dB. = Fair but does not leave much room for variances in conditions.
11dB-20dB. = Good with little or no synchronization problems
20dB-28dB. = Excellent
29dB. or above = Outstanding
Decibel dB Rule of Thumb
Every 3dB represents a doubling or halving of power. i.e. 9dB is twice the signal or power compared to 6dB. Decibel usually represents a margin, i.e. the difference between a background signal and the subject signal. For more information, click here.
2 comments:
Here is my stats:
SNR Margin : 34.7 db
Line Attenuation : 34.0 db
Data Rate : 1024 kbps
I wonder why my Line Attenuation is so high. Could it be due to length of the wire from splitter to modem? It is currently about 20 ft. long.
Actually your SNR is amazingly good. Its more likely your copper from your house to your fiber point. Mine is 8000ft!
House wiring does affect the signal. You can ask the telco to install a DSL splitter at your outside junction box and have one set of wire be DSL only and the other phone only. You will need organized wiring in your house to pull it off.
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