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tribution pair. Example -

      F1   Cable    Pair            F2   Cable    Pair
             25     1748                  2531     748
                    ^--signifies F1 (feeder) cable pair

        Generally, the F1 cable pairs are numbered higher than the F2 cable
pairs, due to the fact that a feeder cable may contain several distribution
cables' worth of cable pairs.  Note once again that all of this numbering
plan is the STANDARD, and it may be far from real life!  As soon as one dist-
ribution pair is replaced, crossed over to another feeder pair, or taken from
service, the set order is interrupted.  In real life, it is most always nece-
ssary to get both F1 and F2 cable assignment data.


                         ********************

--------------------------------------------
Facilities F3-F5, Rural Area Interface (RAI)
--------------------------------------------

        Although cable facilities F3, F4, and F5 may be specified in any loop
plant, they are rarely seen anyw

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