IP Call Processing System for PSTN Feature Integration

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Solution Overview

Problem

The Public Switched Telephone Network (PSTN) lacks the flexibility and advanced call feature management capabilities offered by Voice over Internet Protocol (VoIP) systems, limiting the ability of POTS users to access new call service features and increasing operational costs for service providers.

Innovation Solution

An IP-based call processing system is introduced to control outgoing calls by initiating a media connection between the source and destination devices, enabling the initiation of call features and improving call processing flexibility within the PSTN network by translating SS7 signaling to SIP and using a media gateway to establish connections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If POTS telephony system is used, then call quality and security are maintained, but flexibility and access to advanced call features are limited

Engineering Contradiction:

Improveflexibility and access to advanced call featuresVSAvoidcall quality and security

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces an IP-based call processing system as an intermediary between the POTS network and advanced call features. This mediator translates SS7 signaling to SIP and enables VoIP-based call features while maintaining connection to traditional POTS infrastructure, thus providing flexibility without compromising the reliability of the underlying POTS system

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The IP-based call processing system performs multiple functions: it acts as a signaling translator between SS7 and SIP protocols, serves as a gateway between POTS and VoIP networks, and provides both traditional POTS reliability and modern VoIP flexibility. This multi-functionality resolves the contradiction by combining benefits of both systems

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If traditional POTS call processing is used, then system simplicity is maintained, but operational costs increase

Engineering Contradiction:

Improveoperational cost efficiencyVSAvoidcall processing system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent replaces traditional POTS call processing mechanisms with IP-based processing. By substituting SS7 protocol handling with SIP-based processing over IP networks, the system achieves lower operational costs through more efficient resource utilization while managing complexity through standardized protocols and modular architecture

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If VoIP technology is adopted, then flexibility and advanced call features are provided, but call quality and security deteriorate

Engineering Contradiction:

Improveflexibility and advanced call featuresVSAvoidcall quality and security

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the telephony system into distinct functional layers: the POTS network layer maintains reliability and security, while the IP-based call processing layer provides flexibility and advanced features. This segmentation allows each layer to optimize for its specific function without compromising the other

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The IP-based call processing system acts as a mediator that enables VoIP flexibility while maintaining POTS reliability. It translates between protocols and manages call features without requiring end users to abandon their reliable POTS connections, thus resolving the quality-security versus flexibility trade-off

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10602241B2Method, system network and computer-readable media for controlling outgoing telephony calls to cause initiation of call features

Publication Date: 2020.03.24 BCE

AI summary

The present invention discloses numerous implementations for IP-based call processing systems that can selectively control an outgoing call initiated by a source device to a destination device. The call processing system causes a Service Switching Point (SSP) associated with the source device to initiate a media connection between the IP-based call processing system and the source device. The call processing system further causes initiation of a call feature for the outgoing call using the media connection with the source device. The call feature may include a call restriction feature, a call feature for conveying an audio element to the source device, a call record feature and a call feature for conveying information to the source device. The call processing system further causes establishment of a media connection between the source and the destination devices.