Cisco HFR

Mikael Abrahamsson swmike at
Wed May 26 06:27:09 UTC 2004

On Tue, 25 May 2004, Peter Lothberg wrote:

> You can run the same distance as you do with your 10G system. 
> It;s mostly driven by dispersion, crosstalk and snr if you have many
> amps. Milage varies with span design, but is not much different than
> 10G (as the symbol speed is till 10G).

Ah, so it's actually 4 different wavelengths within the ITU-grid 
alottment of one single 10G wave?
> > Can 10G optical amplifiers be used?
> Yepp..

How does the fact that you need to amplify four times the photons in the 
same wavelength space affect things? Just needs to be taken into 
consideration when calculating the amount/number of 

Is this something in production or alpha/beta test with the DWDM 

Mikael Abrahamsson    email: swmike at

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