D-Link DSL-G604T User Manual page 77

DSL-G604T 54Mbps Wireless ADSL2/2+ Modem/Router Manual
SNR Margin
Line Attenuation
Data Rate
Amount of increased noise that can be tolerated while maintaining the designed
BER (bit error rate). The SNR Margin is set by the Central Office DSLAM. If the
SNR Margin is increased, bit error rate performance will improve, but the data
rate will decrease. Conversely, if the SNR Margin is decreased, bit error rate
performance will decrease, but the data rate will increase.
Attenuation is the decrease in magnitude of the ADSL line signal between the
transmitter (Central Office DSLAM) and the receiver (Client ADSL Modem),
measured in dB. It is measured by calculating the difference in dB between the
signal power level received at the Client ADSL router and the reference signal
power level transmitted from the Central Office DSLAM.
This field displays the ADSL data rate.
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