![]() Maximum signal loss recommendation is usually about 60dB. Measure of how much the signal has degraded between the DSLAM and the modem. ![]() ![]() Here is what you expect for each increase in noise margins.ĦdB or below is bad and will experience no synch or intermittent synch problemsħdB-10dB is fair but does not leave much room for variances in conditions The rule of thumb is that the higher the number the better. This is normal and nothing to worry about. A customer that upgrades from 1.5 to 10.0 will typically see a corresponding decrease in the signal to noise ratio. ![]() Generally speaking, as overall bandwidth increases, your signal to noise ratio decreases. In some instances interleaving can help raise the noise margin to an acceptable level. 6dB is generally the lowest dB manufactures specify in order for the modem to be able to synch. Relative strength of the DSL signal to Noise ratio. SN Margin (AKA Signal to Noise Margin or Signal to Noise Ratio) I will try to explain what all that stuff means here and put it in an easier to understand perspective. This information is for general guidance only:Īre you a DSL tech in a call center and are maybe new to the job, or have you been there for a while but you are just baffled still about how it all works?
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