[c-nsp] 6500s/XFPs (Was XENPAK 10GB-LW (WAN PHY))

[Bill Wichers]

> Naive question from someone who has not looked into 10GE *that* much
> yet - "what is LX4, and why can it not be done with XFPs"?

It's like a mini WDM (Wave Division Multiplexing) mux/demux that runs 4
lamdas at about 2.5Gb/s each through multimode fiber so that 10GbE can
have more than some 20-30 meter reach over legacy fiber. A nifty trick,
but mostly targeted at enterprises and the like that may not have
singlemode everywhere like service providers are likely to.

     -Bill


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Waveform Technology
Systems Engineer