MIL-HDBK-2051 Fiber Optic Shipboard Cable Topology Design GuidanceThis handbook contains suggested design rules for defining a fiber optic cable topology. In addition, this document describes a suggested approach for developing and designing a fiber optic cable topology FOCT for a Naval platform and also identifies the applicable fiber optic component specifications. This handbook is primarily intended for use by the fiber optic cable topology design engineer, but provides useful information to a system design engineer as well.

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MIL-HDBK-2051(SH)

End user equipment

Interconnection box

Intermediate Interconnection box

Local cable

Trunk cable

End user equipment

Interconnection box

Local cable

Note:  This arrangement is not recommended.

FIGURE 3.  Intermediate interconnection box.

Interconnection box 1               Interconnection box 2

End user equipment

36 Fibers

(16 available)

36 Fibers

(12 available)

Interconnection box 3

End user equipment

2 Fibers required

FIGURE 4.  Use of an intermediate interconnection box.

5.3.1.7   Normal and alternate connections  .  For channels with both a normal and alternate connection, if the normal local cable crosses a watertight

bulkhead, the alternate cable should be routed to a different interconnection box than the normal local cable (see figure 5).

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