Mobile-Mediated Extension Calling for Flexible Office Telephony

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Solution Overview

Problem

Conventional communication management systems using wired telephone lines lack flexibility in the use of extension telephone terminals, limiting their convenience.

Innovation Solution

A communication management device that facilitates calls between a mobile phone terminal and an extension telephone terminal, including incoming and outgoing call control units, a voice information conversion unit, and a communication control unit to enable voice communication via the mobile phone terminal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a wired telephone line is used to connect external and extension telephone terminals, then stable communication is achieved, but flexibility and convenience of use deteriorate

Engineering Contradiction:

Improvecommunication stabilityVSAvoidflexibility of extension terminal use

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

A communication management device is introduced as an intermediary between the external telephone terminal and extension telephone terminals. This device receives calls from external terminals and distributes them to appropriate extension terminals, enabling flexible routing without requiring direct wired connections between all terminals, thus improving both stability and flexibility

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the traditional mechanical wired telephone line system with an electronic communication management system that uses signal processing and digital control. This substitution allows for greater flexibility in call routing and terminal connectivity while maintaining reliable communication through electronic switching

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Stability of the object's composition

If a wired telephone line system is used, then fixed connection stability is improved, but ease of operation and convenience deteriorate

Engineering Contradiction:

Improveconnection stabilityVSAvoidconvenience of communication

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The communication management device enables dynamic call routing where calls can be flexibly directed to different extension terminals based on current needs. The system allows extension terminals to be dynamically assigned and reassigned without physical reconnection, improving ease of operation while maintaining stable connections through controlled switching

Inventive Principle:

Principle #15Dynamics

3Device complexity

If traditional wired communication management is used, then system simplicity is maintained, but adaptability to different communication scenarios deteriorates

Engineering Contradiction:

Improvesystem simplicityVSAvoidadaptability to communication scenarios

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The communication management device serves multiple functions: it acts as a call distributor, a switch, and a routing controller all in one unit. This multi-functional design provides adaptability to various communication scenarios without requiring multiple separate devices, thus maintaining relative system simplicity while greatly improving versatility

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12513247B2Communication management device, communication management method, communication management program, and communication management system

Publication Date: 2025.12.30 ITALL INC

AI summary

A communication management device includes an incoming call control unit that transmits an extension incoming call instruction to extension telephone terminals when a mobile incoming call instruction transmitted from mobile phone terminals is input, and based on an incoming call response instruction transmitted from the extension telephone terminals, transmits the incoming call response instruction to the mobile phone terminals; an outgoing call control unit that causes the mobile phone terminals to perform call-requesting outgoing call processing for an external telephone terminal based on an extension call request transmitted from the extension telephone terminals, and transmits an extension outgoing call response instruction to the extension telephone terminals when a mobile outgoing call response instruction transmitted from the mobile phone terminals is input; and a communication control unit that performs voice communication control between the external telephone terminal and the extension telephone terminals via the mobile phone terminals.