David is correct. Dark fiber is unprovisioned by the
carrier and is useful for campus and MAN
installations. For example, I can order dark fiber
between buildings in the same city (under 70 miles)
and run whatever services I wish (DWDM, GE, etc).
'Light' fiber (the term does not exist) is provisioned
by a carrier. In this instance, I must coordinate and
pay for whatever service I am running. For example, I
would specify SONET, GE, etc. The benefit of this
installation is that the service is generally managed
and I can greatly increase the distances. Given the
option, and a good price, however, I would always seek
out dark fiber - it provides the most flexability.
Check out mmfn.com for more information on providers
that have dark fiber (I don't work for them, but they
just presented me with a great sales pitch a month
ago).
Hope this helps.
--- David <[EMAIL PROTECTED]> wrote:
> It is my understanding that dark fiber is
> un-used/non-saturated fiber. I
> havn't heard that its a special type of fiber, just
> a condition of the
> fiber.
>
>
>
> "bahadir korkmaz" <[EMAIL PROTECTED]>
> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > hi.
> > what is dark fiber?
> > i found some sites that says dark fiber means
> unused fiber.
> > is it so?
> > i think dark fiber must be different then unused
> fiber.
> > i mean for example. 10gigabit ethernet runs on
> dark fiber.
> > dark must be something related to bandwidth or
> wavelength.
> >
> > if someone knows dark fiber definition i ll be
> happy.
> >
>
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