Enterprise Voice Call Continuity via PBX Gateway Mediation
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Solution Overview
Problem
Enterprise networks lack flexibility in managing voice calls across different communication networks, as they rely on operator-controlled networks for external connections, which limits control and functionality, especially in transitioning between cellular and IP networks.
Innovation Solution
A system comprising an enterprise PBX, IP-PSTN media gateway, VCC SIP server, VCC media gateway, and policy server that enables voice call continuity by managing signaling and media paths within the enterprise network, allowing clients to communicate across various networks (cellular, PSTN, and IP) using pilot numbers and Session Initiation Protocol (SIP) for call setup and management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If enterprise networks rely on operator-controlled networks for external connections, then network stability is maintained, but control flexibility and adaptability are limited
Solution Approach 1:
The patent introduces a gateway as an intermediary component that bridges the enterprise network and external operator-controlled networks. This gateway enables the enterprise network to maintain control over call setup and management while still connecting to external networks, thus improving adaptability without requiring complete network architecture redesign.
Solution Approach 2:
The patent segments the network control functions by separating the enterprise network internal control from external network dependencies. The enterprise network handles call setup and management internally, while external connections are managed through controlled interfaces, allowing flexible control without managing entire external networks.
2Reliability
If voice call continuity is implemented across multiple networks, then service reliability is improved, but system complexity increases
Solution Approach 1:
The gateway serves as a mediator that handles the complexity of multi-network voice call continuity. It manages the interactions between different network types (cellular, PSTN, IP) while presenting a unified interface to the enterprise network, thus improving service reliability without exposing the full system complexity to users.
Solution Approach 2:
The system implements feedback mechanisms where the gateway monitors call status across different networks and dynamically adjusts routing to maintain continuity. This feedback loop ensures reliable voice calls while automating the complexity management, reducing the burden on system operators.
3Ease of operation
If enterprise networks manage their own call setup and management, then control and flexibility are improved, but operational complexity increases
Solution Approach 1:
The enterprise network is empowered to perform self-service for call setup and management through the gateway interface. The system automatically handles external network connections and protocol translations, allowing enterprise users to focus on their core call management needs without dealing with the complexity of external network protocols and interfaces.
Data Source
AI summary
An improved system and method are disclosed for providing voice call continuity in an enterprise network. For example, an enterprise public branch exchange (PBX) may be configured with a pilot number that is used to provide VCC services when called by a client. Digit collection via DMTF signaling or other means may be used to collect destination information from the client. The enterprise network may use the collected digits to establish a communication session with another device that corresponds to the destination information.