PBX Call Connection Controller for Internet Telephone Bandwidth Management

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Solution Overview

Problem

Conventional Internet telephone systems face limitations in user mobility, secrecy, and power dependency, with increased bandwidth requirements as the number of IP telephones grows, and fail to allow terminal association during call origination from a PC.

Innovation Solution

An Internet telephone system utilizing a call connection controller that enables voice data transmission through existing PBX lines, allowing radio mobile or fixed-line terminals to function as handsets, sharing call control information and transferring call requests between information processors and terminals, thereby reducing the need for additional Internet bandwidth and enabling use without a connected PC.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If voice information is transmitted/received over the Internet line such as LAN, then Internet telephone functionality is enabled, but bandwidth requirements increase as the number of IP telephones grows

Engineering Contradiction:

ImproveInternet telephone functionalityVSAvoidbandwidth requirements

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The system segments the transmission path into two parts: control information travels over the Internet line (LAN) to the PBX, while voice data travels over the PBX's internal telephone network. This segmentation allows Internet telephone functionality to be implemented without requiring the Internet line to carry full- bandwidth voice traffic, thus avoiding increased bandwidth requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The PBX acts as an intermediary between the Internet line and the telephone network. It receives control information from the Internet line, processes call setup, and then routes voice traffic through its own network infrastructure rather than continuing over the Internet line, thereby protecting the Internet line from bandwidth demands.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a handset is connected with a wire to the PC, then secrecy is improved, but the movable range of the user is limited

Engineering Contradiction:

ImprovesecrecyVSAvoidmovable range

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The mechanical connection (wire) between the PC and handset is replaced with a wireless communication system. The handset communicates wirelessly with the PBX, which in turn communicates with the PC over the Internet line. This substitution maintains secrecy through the PBX's call control while eliminating the physical cable constraint on user mobility.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Loss of energy

If the PC is powered off, then energy consumption is reduced, but Internet telephone functionality is lost

Engineering Contradiction:

Improveenergy consumptionVSAvoidInternet telephone functionality

Core Design Contradiction:

Loss of energyVSAdaptability or versatility

Solution Approach 1:

The PBX serves as a mediator that maintains telephone functionality independently of the PC's power state. When the PC is off, the PBX can still receive calls and route them to alternative terminals (such as mobile phones or other PCs) that are currently active, ensuring continuous telephone service without requiring the original PC to remain powered on.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system dynamically changes the active terminal parameter based on the PC's power state. When the PC is off, the system automatically switches the active terminal to an alternative device, maintaining telephone functionality while allowing the PC to remain powered off and conserve energy.

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If multiple terminals are assigned extension numbers, then call routing capability is improved, but user management becomes troublesome

Engineering Contradiction:

Improvecall routing capabilityVSAvoiduser management

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The PBX implements automatic terminal association where terminals are automatically linked to extension numbers and user profiles without requiring manual configuration. The system self-manages the mapping between physical terminals, extension numbers, and user identities, eliminating the need for users to manually manage these associations while maintaining robust call routing capabilities.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS7660597B2Internet telephone system, call connection controller, terminal association method used therein and its program

Publication Date: 2010.02.09 NEC PLATFROMS LTD

AI summary

A PBX, when notified information of an originating manipulation such as dialing of a receiver's number from a keyboard connected with a PC, judges whether an origination request is from the PC or a first terminal. In a case of the request being from the PC, the PBX performs number analysis processing of the PC which is the originator. The PBX judges whether there is information about a terminal associating with the terminal requesting the origination, and when there is information for the terminal, performs to connect with the associating terminal, and processes the origination request to thereby connect with the counterpart terminal. When there is no information about the terminal, the PBX processes the origination request as usual to thereby connect with the counterpart terminal.