for 80 miles or ~120km you will need one of two things either a regen
1/2 or really anywhere leaving less than 80k between spans or an
amplification system.
If you have decent fiber you can probably get away with just a pair of
edfa preamps this will bring up your signal to a level the sfp/xfp will
be able receive. As far as Dispersion compensations for one channel at
120k you will probably not have to worry about it with 80k optics, it
may be an issue but easy to fix with a couple of 100k ODCs. I would
recommend just in case to use a DWDM filter for future proofing it in
case you want to turn up another channel or if you want redundant
connections. SFPs are the most common failures. I would look at no more
than an 8 channel anything else and you would add too much loss and
would require a booster amp as well. I have ran this type of setup up
to 170k with decent results. Anything more and you get into needing much
more complicated system.
You can go with some FS hardware or some other good vendors that make
transponders with integrated amps that would work are
packetlight "part of the RAD group"
Ekinops you could probably do just use a pair of transponders
Some things you will want to is a full FOC data from whomever you are
purchasing the fiber from. If it is regular rates you are paying it is
reasonable to request this from them. If you are getting a deal they
might not be willing to due to costs. At the minimum you will need OTDRS
and ORL numbers. Don't accept the fiber if it has any bad splices or
high loss fiber. a Full FOC will also give you your total dispersion in
pico seconds you can use this to determine if you need compensation.
If you have this information hit me up off list and I can help you out
with what you need.
On 4/14/2017 6:50 AM, fiber...@mail.com wrote:
Sent: Friday, April 14, 2017
From: "Paul McCall"
What equipment can we use (cost efficient) to light up 80 miles of dark fiber
at 10gbit?
You can buy 10G XFPs rated at 75 miles (120 km). However, this won't do you
much good if you are outside the optical budget or the chromatic dispersion
limits. To know what your options are you really need to characterize your
fiber first.
Furthermore your design will depend on your upgrade roadmap. Will you only ever
use one 10G wavelength or will there be more down the line?
If you'll need multiple 10G wavelengths then you are looking at an amplified
DWDM setup with chromatic dispersion compensation.
If you are ok with a single 10G only then you can look at trying that 75 mile
XFP (perhaps with a small amp and some chromatic compensation) or even
aggregating 1G waves using 200 km CWDM SFPs.
Jared
