Gateway Server Bypassing PSTN for Enterprise Call Routing

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Solution Overview

Problem

Enterprises face challenges in controlling cellular service costs and Quality of Service due to the lack of mechanisms for managing routing tables, resulting in incurred interconnect fees when calls are routed through the public switched telephone network.

Innovation Solution

A carrier gateway server is communicatively coupled with an enterprise gateway server to publish Direct Inward Dial numbers, allowing calls to be routed directly from the carrier network to the enterprise network, thereby bypassing the public switched telephone network and avoiding interconnect fees.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If calls are routed through the public switched telephone network to connect carrier network terminals with enterprise network terminals, then connectivity between networks is achieved, but interconnect fees are incurred and cost control is lost

Engineering Contradiction:

ImproveconnectivityVSAvoidinterconnect fees

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The patent extracts the call routing function from the public switched telephone network and implements it directly within the carrier network through a gateway server. The gateway server publishes Direct Inward Dial numbers and routes calls directly to enterprise network terminals, eliminating the need to route through PSTN and thereby eliminating interconnect fees while maintaining connectivity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a gateway server as an intermediary component within the carrier network that mediates call routing between carrier network terminals and enterprise network terminals. This gateway server publishes DID numbers and directs calls directly to the enterprise network, serving as a mediator that eliminates the need for PSTN involvement and the associated interconnect fees.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If cellular service is controlled independently by wireless carrier networks without connectivity to enterprise networks, then carrier network autonomy is maintained, but Quality of Service control and cost management are lost for enterprises

Engineering Contradiction:

ImproveautonomyVSAvoidQuality of Service control

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent merges the carrier network's call routing capabilities with enterprise network requirements through a gateway server that publishes Direct Inward Dial numbers. This integration allows enterprises to control and monitor cellular service quality and costs while maintaining carrier network autonomy, as the gateway server operates within the carrier network but serves enterprise-specific routing needs.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The gateway server performs multiple functions: it publishes DID numbers, routes calls directly to enterprise networks, enables cost control, and provides Quality of Service management. This multi-functional component allows the carrier network to serve both general connectivity needs and specific enterprise requirements for cost and quality control simultaneously.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Loss of energy

If direct routing mechanisms are implemented to bypass the public switched telephone network, then interconnect fees are eliminated, but routing table management complexity increases

Engineering Contradiction:

Improveinterconnect feesVSAvoidrouting table management

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The gateway server automatically publishes Direct Inward Dial numbers and manages routing tables without requiring manual intervention. The system self-configures the routing information needed to direct calls from carrier network terminals to enterprise network terminals, eliminating the need for complex manual routing table management while achieving direct routing and fee elimination.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11412008B2System, method, and computer-readable medium for by-passing the public switched telephone network when interconnecting an enterprise network and a carrier network

Publication Date: 2022.08.09 TANGO NETWORKS INC

AI summary

A system, method and computer-readable medium by-passing the public switched telephone network when routing a call from a carrier network to an enterprise network are provided. A carrier gateway server is communicatively coupled with an enterprise gateway server. The enterprise gateway server is adapted to publish direct inward dial numbers assigned to enterprise extensions to the carrier gateway server. Once published, call setups originated in the carrier network may be routed directly to an enterprise network having a terminal assigned the dialed number of the call setup. Advantageously, the carrier network operator does not incur any inter-connect fee from any public switched network operator.