Modem Testing System With Switch And Line Simulator
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Solution Overview
Problem
Current modem testing systems are inefficient as they can only test a single Customer Premises Equipment (CPE) with a single Central Office (CO) at a time, limiting the scope and efficiency of interoperability testing between multiple CPEs and COs.
Innovation Solution
A modem testing system comprising a line simulator, a switch, and a controller that simulates various line types and noise statuses, allowing for the testing of multiple CPEs and COs by switching connections and controlling the testing process according to a mapping list, while capturing and calculating Bit Error Rates (BERs) to display results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single CPE is tested with a single CO at one time using a basic testing system, then the testing setup is simple, but the testing efficiency is low and cannot test multiple CPEs with multiple COs simultaneously
Solution Approach 1:
The switch is designed to perform multiple functions: it can connect any CPE to any CO, enable parallel testing of multiple CPE-CO combinations, and dynamically reconfigure connections based on testing requirements. This multi-functionality allows the system to test multiple devices simultaneously without requiring separate dedicated test systems for each combination, thereby improving productivity while managing complexity through a single versatile component.
2Productivity
If multiple CPEs and COs are tested simultaneously using a switch, then testing efficiency improves, but the device complexity increases due to additional switching and control requirements
Solution Approach 1:
The controller serves as an intermediary that manages the complexity of coordinating multiple CPEs and COs through the switch. It automatically configures the mapping between devices, controls the testing sequence, and manages connection establishment without requiring direct complex interactions between all testing components. This intermediary role simplifies the overall system control while enabling efficient parallel testing of multiple device combinations.
Data Source
AI summary
A modem testing system is provided for testing interoperability of plural items of customer premises equipment (CPEs) (10) and plural central offices (COs) (60). The modem testing system includes a line simulator (50), a switch (40), and a controller (30). The line simulator is connected to the CPEs and COs for simulating various types of lines and noise statuses. The switch is connected to the line simulator, the CPEs, and the COs for switching connections between the CPEs and the COs. The controller is connected to the line simulator, the switch, the CPEs, and the COs for controlling the switch to set up communications between the CPEs and the COs according to a mapping list, and controlling the line simulator to simulate various types of lines and noises statuses. An exemplary modem testing method is also provided.