IP Telephone Power Failure Adapter Emergency Call Switching

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Solution Overview

Problem

Existing IP telephone systems experience voice delay and interruption when an emergency call is made over an IP network, and lack the ability to identify callers or their location, making it difficult to establish a reliable connection during power failures or network disruptions.

Innovation Solution

An IP telephone set with a power failure adapter that detects emergency calls and switches to an analog network for communication, ensuring reliable emergency calls by transmitting the emergency number via the adapter to the analog network.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If emergency calls are transmitted via the IP network, then the IP telephone system can maintain modern networking capabilities, but voice delay and voice interruption occur causing poor communication quality

Engineering Contradiction:

Improvecommunication qualityVSAvoidvoice delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent introduces an analog telephone network as an intermediary communication path for emergency calls. When emergency call detection is made, the system switches from the IP network path to the analog network path, using the analog network as a mediator to transmit emergency calls without the delay and interruption problems of the IP network.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent implements dynamic path selection for emergency calls. The system can switch between IP network and analog network based on the detected call type. For emergency calls, it dynamically changes the transmission path from IP network to analog network to ensure quality, while maintaining IP network usage for normal calls.

Inventive Principle:

Principle #15Dynamics

2Reliability

If the IP telephone set uses only IP network communication, then the system structure remains simple, but communication fails during power supply interruption or network failure

Engineering Contradiction:

Improvecommunication availabilityVSAvoidsystem structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent makes the IP telephone set具备 dual functionality by integrating both IP network communication and analog network communication capabilities. The telephone set can function on IP network under normal conditions and automatically switch to analog network during power failure or network disruption, providing universal communication capability across different network conditions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent prepares an analog network interface and power failure adapter in advance as a backup communication path. This cushioning measure ensures that when power supply interruption or IP network failure occurs, the system can immediately switch to the pre-prepared analog network path without communication interruption.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If emergency calls are made during power failure with the power failure adapter enabled, then communication can continue via analog network, but the adapter consumes power that should be conserved during power failure

Engineering Contradiction:

Improveemergency call capabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent enables the power failure adapter to be activated only when emergency call detection is made, rather than keeping it continuously enabled during power failure. This preliminary detection mechanism ensures the adapter is activated at the precise moment needed for emergency calls, avoiding unnecessary power consumption during other power failure conditions.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8391444B2IP telephone set, IP telephone system, and dialing method in the IP telephone set

Publication Date: 2013.03.05 NEC PLATFROMS LTD

AI summary

An IP telephone set 4 is provided with a power failure adapter 5. During power failure, a function of the power failure adapter 5 is enabled so that the IP telephone set 4 is connected to an analog network 3 via the power failure adapter 5. As a result, the IP telephone set 4 is allowed to perform telephone communication via the analog network 3. The IP telephone set 4 includes an emergency call detecting portion 40a and a transmitting portion 40b. The emergency call detection portion 40a detects that an emergency telephone number is dialed as a dialed emergency telephone number. The transmitting portion 40b enables the function of the power failure adapter 5 when the emergency call detecting portion 40a detects that the emergency telephone number is dialed and transmits the dialed emergency telephone number to the analog network 3 via the power failure adapter 5.