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)

5.4.1.3.1 Cable routing to multiple interconnection boxes in a service area. If more than one interconnection box is required in an interconnection box service area, the cables entering that area should be separated between

the boxes based on the point of compartment entry. For example, cables coming from aft sections should be terminated in one interconnection box while cables from forward sections should be terminated in the other box.

5.4.1.4 Local cable end user equipment interface . The termination on the local cable that interfaces to the end user equipment should be compatible

with the system equipment. Single fiber connectors can be used for this interface, however, the single fiber connectors should be mounted internally to the equipment or in an equipment rack. Single fiber connectors should not be mounted externally to the equipment. Multifiber connectors can also be used for this interface. Figures 9 and 10 show typical local cable end user equipment terminations.

Trunk fibers Splice tray Local fibers

NRG Redundant

NRG

Redundant

Spare

(a) NRG and redundant fibers

Trunk fibers Splice tray Local fibers

Alternate Alternate Alternate Normal

Normal

Spare

(b) Normal and alternate fibers

Figure 8. Splice tray configuration.