when you order dark fiber, you are getting fiber with nothing on it.
it currently isn't running ATM, SONET, Gigabit Ethernet, or Fibre
Channel. it's not providing a wavelength, or single or group of
lambdas for you to use. you are getting the real thing. you want
it to be good fiber (like corning e-leaf, or lucent truewave, etc)
so you can use the most possible bandwidth on it (very high
bandwidth applications in the 1/3 Tbps to Tbps+ range).
otherwise, you probably don't need it (but it sure would be
nice to have, if you got it on the cheap, or free). consider
using wavelength services or [imuxed?] T1/DS3 or wireless
local-loop instead. generally, when you get dark fiber, it
means you get a 2F hand-off (sometimes 4F depending
on the provider). the dark fiber is run SONET-ring style
(assuming TDM is your method) with 2F/4F BLSR or UPSR
and hopefully goes through a W-DCS and/or ADM (even
better would be Optical, WDM-capable equivalents of the
above) at the Gateway/Telco/Provider side-of-things. You
don't want the 2F/4F hand-off to be collapsed or 'folded',
meaning that the preferred method is two distinctly different
paths into the building and also outside and also into the cable
plant and also using APS 1+1 or 1:1 at the electrical level on
the cards/equipment (1+1 is preferred, I guess).
-dre
""david"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Thanks,
>
>
> david
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=18732&t=18718
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
