IEEE 40GE & 100GE

Stephen Sprunk stephen at
Thu Dec 13 21:51:43 UTC 2007

Thus spake "Chris Cole" <chris.cole at>
> The 40km/10km cost ratio is between 1.6x and 2x, depending on
> the source.
> The 10km/4km cost ratio is between 1.15x and 1.3x, again
> depending on the source.

If those numbers translate into prices (not costs), then I'd prefer to see 
40km and 4km optics, with no 10km optics.  The important point is that the 
40km optics neet to be able to handle 4.1km links with no attenuators, 
preferably without any human tuning at all.  You only pay the extra capital 
cost once (if there even is any, due to more volume of fewer parts), but you 
pay labor and sparing over and over.


Stephen Sprunk         "God does not play dice."  --Albert Einstein
CCIE #3723         "God is an inveterate gambler, and He throws the
K5SSS        dice at every possible opportunity." --Stephen Hawking 

More information about the NANOG mailing list