Mark,
I don't know what Qwest's particulars are in this regard, and, in fact, I'd have to assume that there is no universally applied formula that applies to all of its routes. But I can offer some general observations of what their industry peers are doing, e.g., firms like MFNX, and the like...
This will vary, but there are usually three innerducts _at_least_ placed per conduit on fiber routes, and there may be (often are) multiple conduits, or ducts, placed in each route trench.
The highest density single mode cables to date, that I am aware of, consists of 3 gross (3*144) per outer sheath, i.e., 432 strands per "innerduct." Assuming that there are at least three innerducts in the conduits in question, this would result in a total of 3 * 432, or 1,296 strands per conduit, if the conduit were filled to capacity.
Frank |
