Incoming Call Control Device for Mobile Extension Security
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Solution Overview
Problem
Existing systems require two phone terminals for indoor and outdoor use, and when a single mobile phone terminal is used both indoors and outdoors, there is a need to manage incoming call history for security reasons, especially when the device is used for personal as well as business purposes.
Innovation Solution
An incoming call controlling device and system that determines whether a mobile phone terminal is connected and transfers calls accordingly, using a server to notify the mobile phone terminal of caller information over a different network, ensuring security by not recording the true caller number in the call history.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single mobile phone terminal is used both indoors and outdoors, then device versatility is improved, but security management deteriorates due to inability to separate personal and business call histories
Solution Approach 1:
The patent segments the call handling function by introducing an incoming call controlling device that separates business calls (managed through extension phone number) from personal calls (managed through mobile phone number). This segmentation allows the single mobile phone terminal to maintain both personal and business call histories separately, resolving the security management issue while preserving device versatility.
Solution Approach 2:
The incoming call controlling device acts as an intermediary between the phone network and the mobile phone terminal. It intercepts incoming calls to the extension phone number, determines whether to forward them to the mobile terminal, and manages the call routing. This intermediary function enables secure separation of business and personal communications while allowing the single terminal to serve both purposes.
2Speed
If caller information is transmitted to the mobile phone terminal over the same circuit used for call transfer, then notification speed is improved, but security deteriorates due to potential exposure of true caller number
Solution Approach 1:
The server acts as an intermediary that receives caller information from the incoming call controlling device and transmits it to the mobile phone terminal through a different network (data communication network) than the voice call circuit. This intermediary function enables secure transmission of caller information without exposing the true caller number through the voice circuit, while still providing timely notification.
Solution Approach 2:
The patent replaces the traditional voice-based caller ID transmission mechanism with a data communication-based transmission mechanism. Instead of transmitting caller information through the voice call circuit, the system uses data networks (such as internet or mobile data) to transmit the same information, thereby eliminating the security risk associated with voice circuit transmission while maintaining notification functionality.
3Reliability
If the incoming call is transferred directly to the mobile phone number, then call connectivity is improved, but caller information management deteriorates due to loss of original caller details
Solution Approach 1:
The incoming call controlling device performs preliminary action by capturing and preserving the original caller information (including true caller number) before transferring the call to the mobile phone terminal. This preliminary preservation of information ensures that caller details are not lost during the transfer process, while still maintaining reliable call connectivity through the mobile network.
Data Source
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AI summary
When a mobile phone terminal to be used as an extension phone terminal is carried outdoors, this mobile phone terminal is appropriately notified of caller information. An incoming call controlling device (2) that controls an incoming call from a phone network includes a connection determining unit (3) configured to determine, when an incoming call to a first phone number is received, whether a mobile phone terminal (6) pre-associated with the first phone number is connected as an extension phone to the incoming call controlling device (2); an incoming call controlling unit (4) configured to transfer the incoming call to a second phone number, which is a mobile phone number of the mobile phone terminal (6), when it has been determined that the mobile phone terminal (6) is not connected to the incoming call controlling device (2); and a caller information transmitting unit (5) configured to transmit, to a server (7), identification information for identifying the mobile phone terminal (6) and caller information of the incoming call when a transfer by the incoming call controlling unit (4) is performed. The server (7) is configured to notify a phone terminal of the caller information by using a network different from a circuit used for the transfer.