Fiber Optic Cable Mid-Span Breakout Configuration
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Solution Overview
Problem
Manual splicing of branch cables from main cables in fiber optic networks is time-consuming and expensive, and pre-terminated cable systems face installation difficulties, especially in underground and aerial applications due to conduit and retention loop complications.
Innovation Solution
The implementation of mid-span breakout configurations on pre-terminated fiber optic distribution cables, featuring a tether branching out from the main cable with a splice location, protective sleeve, and retention block to secure the tether, allowing for efficient and secure splicing without the need for field termination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual splicing is used to separate branch cables from main cables, then fiber optic network connectivity is achieved, but installation time and cost increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-terminating the branch cables at the factory with connectors already attached to the fiber ends. This eliminates the need for time-consuming field splicing operations, as the cables are prepared in advance with all termination work completed before delivery to the installation site.
Solution Approach 2:
The patent replaces the mechanical splicing system with a connector-based mating system. Instead of physically joining fiber cores through splicing, the invention uses pre-terminated connectors that mate with corresponding receptacles, substituting a complex mechanical alignment and fusion process with a simpler plug-and-connect mechanism.
2Loss of time
If pre-terminated cable systems are used, then installation time is reduced, but installation difficulty increases due to conduit and retention loop complications
Solution Approach 1:
The patent applies segmentation by dividing the cable system into modular components: main cables with integrated breakout locations, branch cables with pre-attached connectors, and separate retention blocks. This modular design allows each component to be independently prepared and installed, simplifying the overall installation process despite the complexity of pre-termination.
Solution Approach 2:
The patent introduces retention blocks as intermediary components that facilitate the connection between pre-terminated branch cables and main cables. These retention blocks serve as mediators that hold the connectors in proper alignment and provide a stable mounting structure, making the installation of pre-terminated systems easier by managing the physical constraints of conduit and retention loops.
3Reliability
If field splicing enclosures are used, then secure fiber connection is achieved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the splicing function from complex field splicing enclosures and integrates it into the pre-terminated cable design itself. By moving the termination work to the factory and bringing only simple connectors to the field, the invention removes the need for bulky splicing enclosures and associated equipment, reducing device complexity while maintaining connection security.
Solution Approach 2:
The patent applies self-service by designing the pre-terminated cables to be self-contained with connectors already attached and protected. The cables arrive at the installation site ready to connect, eliminating the need for external splicing equipment, enclosures, and specialized field splicing tools, thereby reducing overall system complexity.
Data Source
AI summary
The present disclosure relates to a telecommunications cable including a distribution cable and a tether that branches from the distribution cable at a mid-span breakout location. A flexible closure covers the mid-span breakout location. Within the closure, fibers are broken out from the distribution cable and spliced to fibers of the tether. The lengths of broken out fibers within the flexible closure are provided with sufficient excess fiber length to allow the closure to be readily bent/flexed in any direction without damaging the fibers.