Semi-Hardened Cable Assembly Mid-Span Access
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Solution Overview
Problem
Current solutions for routing, securing, and protecting pre-terminated and/or pre-connectorized optical fibers at mid-span access locations in fiber optic communications networks are either too delicate, have a large form factor, or require skilled technicians for installation and reconfiguration, leading to high costs and inefficiencies.
Innovation Solution
A semi-hardened cable assembly with a flexible cover that exposes connectors for easy access after installation, allowing for quick interconnections without splicing, and includes an anti-rotation mechanism to prevent rotation and a ripcord mechanism for exposing connectors, enabling easy deployment through small conduits and existing equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rigid closure is used to protect optical fibers at mid-span access locations, then environmental protection and security are improved, but the ability to deploy through small diameter conduits and over sheave wheels deteriorates
Solution Approach 1:
The closure transitions from a flexible state during installation to a hardened state during operation. During installation, the closure remains flexible to allow deployment through small conduits and over sheave wheels. After installation, the closure is hardened by applying a rigid coating or material to provide environmental protection and security while maintaining the ability to be reconfigured if needed.
Solution Approach 2:
The physical properties of the closure are changed from flexible to rigid after installation. This parameter change allows the closure to meet different requirements at different stages: flexibility during installation for easy deployment, and rigidity during operation for environmental protection and security.
2Ease of manufacture
If an aerial splice closure is used to interconnect drop cables with distribution cable, then optical fiber connections can be made, but skilled technicians are required and installation time increases
Solution Approach 1:
Optical fibers are pre-terminated with connectors at the distribution cable end before field installation. This preliminary action eliminates the need for splicing operations in the field, allowing technicians to simply connect pre-terminated fibers to drop cables, significantly reducing installation time and skill requirements.
Solution Approach 2:
The system is designed to be self-configuring with pre-terminated fibers and standardized connectors that automatically align and interconnect when mated. This self-service approach eliminates the need for skilled technicians to perform complex splicing and configuration tasks during installation.
3Manufacturing precision
If pre-engineered drop cables with predetermined lengths are used, then factory preparation is improved, but the ability to accommodate inaccurate measurements and installation errors deteriorates
Solution Approach 1:
The closure remains reconfigurable even with pre-engineered drop cables. The hardened closure can be opened and reconfigured if measurement errors or installation issues arise, providing flexibility to adjust the system while maintaining the benefits of factory preparation.
Solution Approach 2:
The closure transitions from a closed protective state to an open reconfigurable state when adjustments are needed. This parameter change allows the system to accommodate installation errors while maintaining the quality benefits of factory preparation under normal conditions.
4Object-affected harmful factors
If connectors are permanently enclosed in the closure, then environmental protection is maintained, but access for interconnection becomes difficult
Solution Approach 1:
The closure is designed to be reconfigurable, transitioning from a closed protective state during installation to an accessible state during operation and maintenance. The closure can be opened to expose connectors for interconnection and then resealed to restore environmental protection when not in use.
Solution Approach 2:
The closure state changes from sealed to open during connector access operations. This parameter change allows connectors to be accessed when needed while maintaining environmental protection during normal operation, balancing accessibility with protection.
Data Source
AI summary
The present invention provides a cable assembly comprising a flexible network access point that includes a flexible cover over a mid-span access location, providing environmental protection for the mid-span access location and facilitating installation of a distribution cable. Subsequent to installation, the mid-span access location is exposed and accessed by pulling a ripcord, for example, thereby removing a portion of the flexible cover. This exposes one or more connectors, which may be single or multi-fiber connectors, that are configured to receive the receptacles of one or more drop cables and/or tethers. Thus, a semi-hardened, selectively-usable closure is provided.