Pre-buried Cable Group Installation for FttH Networks
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Solution Overview
Problem
Existing methods for installing the final part of a cable network, such as FttH or CttH, between a distribution point and end points are either time-consuming and labor-intensive or expensive, particularly due to the need for couplings and blowing techniques.
Innovation Solution
A method involving burying a group of cables along a street, preparing access points, cutting and retrieving cable ends to connect end points without additional couplings, using a multicable system with a low-friction outer sheath and water-blocking filler material to facilitate easy cable movement and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fusion weld couplings are used to connect cables from the buried cable group to individual houses, then reliable connections are achieved, but the installation becomes time-consuming and labor-intensive
Solution Approach 1:
Cables are pre-buried in a cable group along the street route before individual house connections are needed. This preliminary placement allows multiple houses to be served from the same cable group without repeated excavation and coupling operations, significantly reducing installation time while maintaining connection reliability through proper initial cable placement
2Reliability
If fusion weld couplings are used to connect cables, then reliable connections are achieved, but manual labor requirements increase significantly
Solution Approach 1:
The cable group is buried in advance along the planned route, so that when houses need to be connected, workers simply need to access pre-positioned cables at manholes rather than performing complex coupling operations. This preliminary cable placement dramatically simplifies the connection process while ensuring reliable connections are established during the initial burial phase
3Device complexity
If blowing technique is used to install cables through ducts, then couplings are avoided, but equipment costs and installation time increase
Solution Approach 1:
Instead of using expensive blowing equipment to push cables through ducts to each house, the cable group is pre-buried along the street with manholes positioned at intervals. Cables are accessible at these manholes, eliminating the need for blowing machines while maintaining a coupling-free approach. This preliminary cable placement strategy achieves the same goal as blowing technique but with simpler, more cost-effective methods
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the need for expensive equipment and manual labor, providing a cost-effective and efficient method for connecting end points by eliminating the need for additional couplings and expensive blowing techniques.
Implementation Method 1
a friction-limiting filler material is provided between the outer sheet and the group of cables such that the cables can be easily moved back
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
The invention relates to a method for installing a final part of a cable network extending between a distribution point and an end point, comprising of burying cables close to end points, preparing a first access point, preparing a subsequent access point, cutting a cable which must be connected to the previous end point, and moving this cable back from the previous access point so that a free cable part is obtained with a length corresponding to the distance between the subsequent and previous access point, and using this free cable end part for the purpose of connecting the end point.