d/lloodd11_128

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and your mind open.

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At this point, we will detail each point along the Loop Distribution Plant.

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Cable Facility F1 - CO Feeder
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        The F1 cable is the feeder cable which originates at the Main Distribu-
tion Frame (MDF) and cable vault at the local CO and terminates at the SAI.
This cable can contain from 600 to over 2000 pairs, and often more than one
physical F1 cable is needed to service a single Serving Area (at an SAI).
The F1 is almost always located underground, because the size, weight, and
number of feeders leaving the CO makes it impossible to put them on normal
telephone poles.  Since is is also impractical to use one single piece of
cable, the F1 usually consists of several pieces of large, pressurized or
armored cable spliced together underground (this will be covered later) into
a single cable.

Cable Numbering
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        In order to make loca