Cisco HFR

Wed May 26 06:03:50 UTC 2004

Isn't the regen seperate from the speed ie layer 1 and vs dwdm/lambda? 

Regards,

--
Martin Hannigan                         (c) 617-388-2663
VeriSign, Inc.                          (w) 703-948-7018
                                         <http://www.verisign.com/>

-----Original Message-----
From: owner-nanog at merit.edu <owner-nanog at merit.edu>
To: Mikael Abrahamsson <swmike at swm.pp.se>
CC: nanog at merit.edu <nanog at merit.edu>
Sent: Tue May 25 22:12:03 2004
Subject: Re: Cisco HFR

> > Incorrect. There are transponders that put a 40G signal in a 10G DWDM
> > optical system. (You have to move a step up from morse code to make the 
> > side-bands fit..) And they atleast run in 80 chanel systems.
> 
> What is the range of this, how often do you need to amplify and regen the 
> 40G signal compared to 10G? 

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).

> Can 10G optical amplifiers be used?

Yepp..

-P