Allied Fiber Begins Building National Dark Fiber Ring > Looks like

reply to BillRoland

Re: Looks like

One path, multiple fibers. One to transmit, one to receive, depending on the technology and techniques employed.

I would agree with this. The Miami leg is not really a ring.

A bad enough derailment would take out your ring. In some cases it may be worth the savings to risk some downtime.

Agreed, I have seen train derailments dig down 8' before, that would take out almost any buried fiber. Also, true diversity for something like this, would require the fiber paths to be much further apart than a few dozen feet. Also, a crew boring across some tracks that hit the cable on one side, could just as easily hit another cable buried on the other.

Those things on the railroad right-of-way is quite common anyway. I work in the signals department for CSX and you cant put in a new crossing on any line without fiber or in some instances gas lines running along the tracks. Another run of fiber on most rail lines wont make a bit of difference, after all the railroad does make money off the leases in the process.

reply to Euphrates
It is still a ring but the terms are diverse if one cable gets cut you still have service or non-diverse where both sides of the ring are in the same cable. If that cable gets cut you lose both side of the ring.