I agree with what Baldur suggested.. Only thing I would point out that .. Hardly anyone installs 200km fiber runs without having some sort of a Regen facility.
While you can push the signal over the 200km link, in the long run you may be better off see if there a Regen facility (typically 70/80km) that you can use to re-generate the light. Best of luck. Faisal Imtiaz Snappy Internet & Telecom ----- Original Message ----- > From: "Baldur Norddahl" <baldur.nordd...@gmail.com> > To: "nanog list" <nanog@nanog.org> > Sent: Saturday, December 24, 2016 2:30:40 PM > Subject: Re: DWDM on 250 Km dark fiber without re-amplification > Hello > > I have not done this as our links are not that long. However in theory > this is how I would do it. There are nice integrated solutions that will > do it as a black box, but someone else will have to tell you about that. > I am using Fiberstore as a reference because they have the necessary > components with pricing directly online, but there is of course multiple > alternatives. > > So first off forget about 40G and 100G. This will be N x 10G and N can > be as large as 96 channels. 100G would be the same equipment (possibly > without dispersion compensation) but with each 100G stream as four 25G > wavelengths. However the optics are very expensive and hard to get for > 40G and 100G while 10G is relatively cheap and easy. > > You need the following components: > > http://www.fs.com/support/dwdm-edfa-amplifier-for-long-haul-applications-100 > > They list all you need with a nice drawing. Get the components from them > or someone else. The nice integrated solutions are just these components > in a box. > > They only list the solution as 200 km. You will have to send them a mail > and ask if they can do 225 km. > > Also you need to check that the black fiber provider allows amplified > signals at this level. Not everyone do. Normally the signals are not > that dangerous, but with this a unaware tech can go blind if he is > unlucky. It is not clear if the Fiberstore equipment automatically turns > of the laser in the case of a fiber cut and that might also be a > requirement. > > Regards, > > Baldur > > > > Den 24/12/2016 kl. 01.14 skrev Jeremy: >> 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
