Telephone Line Test System Automatic Provisioning
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Solution Overview
Problem
Current methods for provisioning telephone line test systems are expensive and disruptive, requiring two-ended measurements that can affect service quality and necessitate human intervention, especially when computing CO limits.
Innovation Solution
An automated process that computes CO limits using single-ended measurements, allowing for background operation without human intervention, by measuring electrical properties and calculating offset values to accurately estimate line lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two-ended measurements are used to compute CO limits, then measurement precision is improved, but device complexity and human intervention requirements increase
Solution Approach 1:
The patent extracts the CO limit computation from the complex two-ended measurement process and implements it as a separate automated routine within the test system controller. This allows the controller to automatically calculate CO limits using single-ended measurements without requiring external intervention or complex test setups.
Solution Approach 2:
The test system controller performs self-provisioning by automatically computing its own CO limits using single-ended measurements taken during normal operation. The system serves itself by implementing an automated routine that eliminates the need for external technicians to perform complex two-ended measurements and configure the system manually.
2Measurement precision
If two-ended measurements are performed, then CO limit computation accuracy is improved, but service disruption increases
Solution Approach 1:
The patent enables continuous service operation during CO limit computation by using single-ended measurements that can be taken without disrupting normal telephone service. The automated routine performs measurements and calculations in the background while the network continues to operate normally, eliminating service interruptions.
Solution Approach 2:
The system performs self-provisioning through automated single-ended measurements that do not require human intervention or service disruption. The controller automatically executes the measurement routine, processes the data, and updates CO limits without taking the network offline or requiring technician presence at customer premises.
3Productivity
If automated single-ended measurements are used, then productivity is improved, but measurement precision may be reduced
Solution Approach 1:
The patent changes the measurement parameters from two-ended to single-ended measurements, which enables automated execution while maintaining sufficient accuracy for CO limit computation. The system adjusts the measurement approach to use electrical properties obtained during normal operation, transforming the provisioning process into an automated high-speed operation.
Solution Approach 2:
The system performs preliminary single-ended measurements during normal operation to gather the electrical properties needed for CO limit computation. This preliminary data collection enables subsequent automated calculations without requiring additional measurement campaigns, thereby maintaining both speed and accuracy.
4Measurement precision
If human intervention is required for provisioning, then measurement precision is improved through manual verification, but ease of operation deteriorates
Solution Approach 1:
The test system controller performs self-provisioning by automatically executing measurement routines, processing data, and computing CO limits without human intervention. The automated routine includes built-in validation logic that ensures accuracy while eliminating the need for manual verification steps, thereby simplifying the overall provisioning operation.
Solution Approach 2:
The system implements automated feedback mechanisms where the controller monitors measurement results, validates data quality, and adjusts the provisioning process accordingly. This closed-loop approach maintains measurement precision through automated verification while eliminating the need for human operators to manually verify each step.
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 costs and minimizes service disruptions by enabling accurate line length estimation and CO limit computation without the need for two-ended measurements or human technicians, improving the efficiency and reliability of test system provisioning.
Implementation Method 1
measuring electrical properties on each of a plurality of paths through a switching system
Data Source
AI summary
A telephone line test system that may be used to compute line length of subscriber lines connected to a central office or other distribution point. When initially installed, the test system may automatically compute CO limits. The CO limits are computed from single-ended measurements on subscriber lines and represent electrical effects of the path between a test head and the distribution point. These CO limits are used to more accurately compute the length of lines connected to the distribution point using measurements made by the test system. Because the process uses single-ended measurements, it may be run in background mode during the initial installation of the test system or at any subsequent time it is desired to update the CO limits.