Cordless Base Unit Automatic Answering Control for Mobile Terminals
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Solution Overview
Problem
Existing cordless telephone systems do not allow mobile information terminals, such as smartphones, to easily function as handsets outside the home due to automatic answering by the base unit, preventing users from answering calls.
Innovation Solution
A cordless telephone apparatus with a cordless base unit that distinguishes between mobile information terminals used inside or outside the house, allowing only those inside to automatically answer calls after a predetermined time, while continuing ringing for those outside, enabling users to answer calls without losing opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the cordless base unit performs automatic answering after a predetermined time, then the incoming call can be answered automatically, but the mobile information terminal cannot answer the call because the base unit answers earlier
Solution Approach 1:
The system dynamically adjusts the automatic answering behavior based on the location status of the mobile information terminal. When the terminal is detected to be outside the house, the base unit suppresses automatic answering and allows the mobile terminal to answer calls. When the terminal is inside the house, automatic answering is enabled after the predetermined time period. This dynamic adaptation resolves the contradiction by making the automation level flexible rather than fixed.
Solution Approach 2:
Different automatic answering behaviors are applied to different locations (inside vs. outside the house). The system identifies the terminal's location and applies appropriate answering rules locally: automatic answering is permitted inside the house but prohibited outside the house. This local differentiation allows the system to optimize for convenience in each context without compromising the other.
2Adaptability or versatility
If the mobile information terminal is used as a handset outside the house, then portability is improved, but the user cannot answer calls because the base unit answers automatically
Solution Approach 1:
The system dynamically switches between two operational modes based on terminal location: when outside the house, the mobile terminal maintains full answering capability with no automatic intervention; when inside the house, automatic answering is activated after the predetermined time. This dynamic mode switching ensures reliable call answering in both portable and stationary usage scenarios.
Solution Approach 2:
The base unit acts as an intermediary that monitors terminal location and controls the answering behavior accordingly. It receives location information from the mobile terminal and mediates the calling process by either allowing the mobile terminal to answer directly (when outside) or initiating automatic answering (when inside). This intermediary control resolves the reliability issue by ensuring the appropriate answering mechanism is always active.
3Productivity
If the base unit answers calls automatically after a predetermined time, then automation is improved, but the mobile information terminal loses the opportunity to answer
Solution Approach 1:
The system applies different automation levels to different usage contexts: high automation (automatic answering) when the terminal is inside the house, and low automation (manual answering only) when outside. This localized quality adjustment ensures that automation efficiency is optimized for home usage while user control is preserved for mobile usage, resolving the contradiction between these two operational requirements.
Data Source
AI summary
A cordless base unit includes a controller that performs control in a case where an incoming call arrives from the landline telephone network, in such a manner that the cordless handset and the mobile information terminal perform sound ringing for the incoming call, that automatic answering starts after a predetermined time has elapsed and the sound ringing for the incoming call is stopped except for the mobile information terminal that is set to be used outside of the house, and that while the automatic answering is performed, the mobile information terminal that is set to be used outside of the house continues to perform the sound ringing for the incoming call.