[179608] in North American Network Operators' Group
Re: DWDM and EDFA and DCM
daemon@ATHENA.MIT.EDU (Rodrigo Augusto)
Wed Apr 22 14:53:01 2015
X-Original-To: nanog@nanog.org
Date: Wed, 22 Apr 2015 16:01:39 -0300
From: Rodrigo Augusto <rodrigo@1telecom.com.br>
To: Mikael Abrahamsson <swmike@swm.pp.se>
In-Reply-To: <alpine.DEB.2.02.1504222031580.16871@uplift.swm.pp.se>
Cc: nanog <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Buy 80km sfp+ dwdm modules=8A c21 and c51.
On this scenario a don=B9t 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 this=8A because I use
80km sfp+ and my distance is 60km=8A can I have a chromatic dispersion? I
think to use a EDFA, but i=B9m not sure this=8A if I have a chromatic
dispersion I have to use a DCM not a ADFA or a booster=8A
Right?!
=20
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@connectoway.com.br
( (81) 3497-6060
( (81) 8184-3646
( INOC-DBA 52965*100
On 22/04/15 15:33, "Mikael Abrahamsson" <swmike@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
>>chromatic
>> 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.
>
>--=20
>Mikael Abrahamsson email: swmike@swm.pp.se
