Buy 80km sfp+ dwdm modules 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 this because I use 80km sfp+ and my distance is 60km can I have a chromatic dispersion? I think to use a EDFA, but i¹m not sure this if I have a chromatic dispersion I have to use a DCM not a ADFA or a booster Right?! 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.
-- Mikael Abrahamsson email: swmike@swm.pp.se