Hi, does somebody know of a good resource to learn more about SFP’s? I recently upgraded a long haul WAN-link from 160km SFP’s to 210km, but did not see any increase in RX-level (obviously because TX-level just increased around 1dB). So what is the actually difference between 160km and 210km? I do thing I have read some place that the main difference is the RX sensitivity, but I am not able to find where I have read it. Is that correct? And if so, by sensitivity: does this mean that the E/O-module are able to generate a more «accurate» electrical signal from a weaker optical level?
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