Modular Fiber Distribution Hub with Swing Frame Access
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Solution Overview
Problem
Passive optical networks face challenges in scalability and flexibility due to the limitations of traditional fiber distribution hubs (FDHs) in accommodating varying fiber counts and sizes, which restricts their ability to efficiently manage and route fibers, especially as the number of subscribers increases.
Innovation Solution
The design of modular fiber distribution hubs (FDHs) with a swing frame and bulkhead that includes separate regions for splitters, termination modules, and storage, allowing for incremental additions and efficient cable management, enabling flexible configuration and scalability by pivoting the swing frame for maintenance and access, and supporting a range of fiber counts and sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional fiber distribution hubs are used, then the basic fiber routing function is provided, but the scalability and flexibility are limited when accommodating varying fiber counts and sizes
Solution Approach 1:
The fiber distribution hub is divided into modular components including a cabinet, swing frame, bulkhead, and various regions (splitter region, termination region, storage region). These modular segments can be independently configured and assembled to accommodate different fiber counts and sizes, enabling scalability without requiring complete system replacement.
Solution Approach 2:
The swing frame is designed to be pivotable between a closed position and an open position, providing dynamic access to the bulkhead and internal components. This dynamic mechanism allows maintenance personnel to easily access and modify fiber routing configurations as the network grows, enhancing flexibility while maintaining a compact form factor when closed.
2Quantity of substance
If the number of subscribers increases, then the network capacity needs to expand, but the traditional FDH structure restricts the ability to efficiently manage and route additional fibers
Solution Approach 1:
The bulkhead is positioned perpendicular to the swing frame, creating a three-dimensional routing architecture. This perpendicular arrangement allows fibers to be routed in multiple spatial dimensions, efficiently managing increasing fiber counts by utilizing vertical and horizontal spaces independently, thereby maintaining ease of management as capacity expands.
Solution Approach 2:
The bulkhead acts as an intermediary component between the swing frame and the fiber routing system. It provides a structured interface with multiple regions (splitter, termination, storage) that mediates the organization and management of increasing fiber quantities, making it easier to manage and route fibers as subscriber numbers grow.
3Adaptability or versatility
If modular components are used to enhance scalability, then the flexibility and adaptability improve, but the device structure becomes more complex
Solution Approach 1:
The swing frame serves multiple functions: it provides the structural framework for the cabinet, supports the bulkhead, enables dynamic access through pivoting, and facilitates cable management. This multi-functionality reduces the need for separate components, thereby increasing flexibility while minimizing the addition of structural complexity.
Solution Approach 2:
The cabinet, swing frame, and bulkhead are combined into an integrated modular assembly where the swing frame acts as both a structural support and a access mechanism. By merging these functions into a single pivoting assembly, the design achieves flexibility and adaptability without proportionally increasing overall structural complexity.
Data Source
AI summary
A fiber distribution hub includes a cabinet; a termination region positioned within the interior of the cabinet; at least one termination module mounted in at least one opening defined at the termination region; fiber optic connectors coupled to termination adapters of the termination module; intermediate fibers extending rearwardly of the fiber optic connectors; and a multi-fiber connector terminating the intermediate fibers. The termination module includes a housing enclosing the termination adapters. One or more termination modules can be incrementally added to the fiber distribution hub.