On Sat, 19 Oct 2013, Chris Costa wrote:
What are the opinions/views on attenuating short, 1310nm LR cross-connects. Assume < 20m cable length and utilizing the same vendor optics on each side of the link. Considering the LR transmit spec doesn't exceed the receiver's high threshold value do you pad the receiver closer to the median RX range to avoid potential receiver burnout over time, or just leave it un-padded?
If this is using Cisco 10GBASE-LR optics, then padding in this instance should not be necessary. However, if SR optics (again, assuming these are Cisco devices), would be a better fit for the distance, using an OM3 or OM4 multimode jumper. The reason I asked about the vendor is because things like SR and LR can mean different things to different vendors. jms