Removable Installation Device for Fiber Drop Cable Routing
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Solution Overview
Problem
The deployment of fiber to the home (FTTH) services faces challenges with link loss due to additional connectors or splices required when transitioning from outdoor to indoor fiber cables, and existing cable penetration solutions are inadequate for flexible routing without damaging cables or causing aesthetic issues and disruption.
Innovation Solution
A drop cable assembly with a removable installation device that includes a preterminated optical fiber drop cable and a push-pull device or adhesive sleeve for tool-less removal, allowing flexible routing through conduits and minimizing hole size, with a pulling sock and pushing device for easy installation and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional cable penetration solutions (push rod or pull sock) are used, then cable installation can be achieved, but the solution lacks flexibility to handle both rigid penetration and flexible conduit routing
Solution Approach 1:
The installation device is divided into two functional segments: a rigid pushing device for penetrating walls and conduits, and a flexible pulling sock for routing through tight spaces. The transition from pushing to pulling mode allows the system to adapt to different installation environments without requiring a completely different device.
Solution Approach 2:
The device transitions from a rigid pushing configuration to a flexible pulling configuration during installation. The pushing rod provides rigidity for penetration, while the pulling sock provides flexibility for routing. This dynamic change in mechanical properties allows the system to handle both rigid penetration and flexible conduit routing requirements.
2Adaptability or versatility
If additional connectors or splices are added for cable transitions, then cable routing flexibility is improved, but link loss increases and performance degrades
Solution Approach 1:
The optical fiber drop cable is pre-terminated with connectors at the factory before installation. This preliminary termination eliminates the need for field splicing or additional connectors during installation, thereby maintaining routing flexibility while preventing link loss and performance degradation that would result from additional connection points.
3Ease of operation
If large holes are drilled for cable penetration, then cable installation is simplified, but aesthetic appearance deteriorates and disruption to homeowners increases
Solution Approach 1:
The pulling sock is constructed as a flexible, thin-walled device that can be pulled through small penetration holes and tight conduit spaces. This flexible shell design allows the installer to use minimal-sized holes that are less obtrusive aesthetically while still enabling cable installation through the required pathways.
4Productivity
If pre-terminated connectors are used, then installation speed is improved, but the cable becomes more sensitive to damage during penetration
Solution Approach 1:
The pulling sock serves as a protective cushion that envelops the pre-terminated connector and cable during the installation process. This beforehand cushioning protects the delicate pre-terminated components from damage while they are being pulled through walls and conduits, enabling the use of pre-terminated connectors without increasing damage risk.
Data Source
AI summary
A cable assembly is described that includes a preterminated optical fiber drop cable having a connector body mounted on a terminal end thereof, and a removable installation device attached to a jacket of the preterminated optical fiber drop cable by an attachment portion, wherein the attachment portion includes a pair of tear tabs that provides tool-less removal of the installation device from the preterminated optical fiber drop cable.