Hi all, First, i'm sorry for my english, i'm french and i don't have a good level in this language. But i want some informations and i'm sure, someone will be give the good anwser about my question. So, i'm regarding to rent a dual dark fiber in France, the estimated distance is 225 Km, but i know there are a lot of optical switching on the highway where it's fiber is installed (in theory, all 80 Km). So, i used the bad scenario, in adding 25 Km on my need. I would like to buy a amplificator and multiplexer DWDM to add some 10Gb/s waves on this dark fiber. I've see that the amplification is better on 100 Gb/s synchronised ports, but we don't have enoug capacity on our router to add 100 Gb/s interfaces. So, someone has installed this type of hardware on a dark fiber without regeneration on 250 Km of distance ? If yes, with what kind of hardware ? If you are commercial for this hardware, please contact me in private message. Thanks you for your time, Jérémy AS197922