Is dark fiber in backbone networks good or bad?
closed as not a real question by Dennis Williamson, Warner, sysadmin1138♦, Zoredache, Mark Henderson♦ Jul 30 '10 at 21:17
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Dark fiber is just fiber that is not active. It is usually dark because it is planned surplus for future growth, this is normal.
Dark fiber is bad if it's 1998 and you've invested your retirement savings in large telecoms, or if it's 2002 and you're a large telecom.
Dark fiber is good if you're an equipment vendor or if it's 2003 and you're looking to exploit the overly-optimistic decision making of the previous decade.
dark fiber is good, unless it was supposed to be lit up.
Dark fibre is fantastic if you're looking for a PtP solution. Another application would be to get access to an ISP otherwise not available but utilizing the fiber between facilities.
Ultimately, it's one of the most versatile high bandwidth and low latency telecommunications solutions.
Dark Fiber is good if the price of running new fiber is very high, you only do it every 4-7 years, and you still want room to grow your network.
Dark Fiber is bad if the price of running new fiber is low and space in your cable-trays/conduit is at a premium.