Rodrigo Augusto rodrigo at 1telecom.com.br
Wed Apr 22 19:01:39 UTC 2015

Buy 80km sfp+ dwdm modulesŠ c21 and c51.
On this scenario a don¹t have a EDFA, only put these sfp+ and I have link
on other side( 60km) but I have a -19dbm and other side I have -21dbm( ddm
sfp+ output).. I think I have a better signal than thisŠ because I use
80km sfp+ and my distance is 60kmŠ can I  have a chromatic dispersion? I
think to use a EDFA, but i¹m not sure thisŠ if I have a chromatic
dispersion I have to use a DCM not a ADFA or a boosterŠ

Rodrigo Augusto
Gestor de T.I. Grupo Connectoway
http://www.connectoway.com.br <http://www.connectoway.com.br/>
http://www.1telecom.com.br <http://www.1telecom.com.br/>
* rodrigo at connectoway.com.br
( (81) 3497-6060
( (81) 8184-3646
( INOC-DBA 52965*100

On 22/04/15 15:33, "Mikael Abrahamsson" <swmike at swm.pp.se> wrote:

>On Wed, 22 Apr 2015, Rodrigo Augusto wrote:
>> Does anyone have some experience to use dwdm monofiber mux/demux ( ex.
>> fiberstore ) about 68km using a ADFA ? Have I to use a DCM( for
>> dispersion ) on this distance? When I have to use a DCM ?
>You have to use DCM when the chromatic dispersion caused by your distance
>exceeds what your receiver optical module can handle.
>So the answer is "it depends". If you're using 1GBASE-DWDM optics then
>you'll be fine, if you use 10GBASE DWDM optics then it depends on the
>distance they were designed to handle, if you buy the 40km ones then you
>should have DCM.
>Mikael Abrahamsson    email: swmike at swm.pp.se

More information about the NANOG mailing list