Distributed VoIP Account Code Handling
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Solution Overview
Problem
Centralized handling of account codes in VoIP systems leads to excessive network load on headquarters servers and potential call failures during server or network outages.
Innovation Solution
Distributing the account code service across multiple servers and switches, with voicemail servers handling account code calls and enabling failover to other servers in case of unavailability, allowing administrators to manage resources effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If account code service is handled centrally by headquarters server, then call control and accounting are simplified, but network load on headquarters server increases excessively
Solution Approach 1:
The patent divides the centralized account code service into distributed segments across multiple servers including headquarters server, area servers, and site servers. Each server handles account code processing for its respective region or site, segmenting the workload to prevent excessive concentration on the headquarters server while maintaining overall system control.
2Ease of operation
If account code service is handled centrally by headquarters server, then centralized control is maintained, but system reliability decreases during server or network failures
Solution Approach 1:
The patent implements a dynamic hierarchical architecture where servers can dynamically assume different roles based on operational status. When the headquarters server or area server fails, site servers can dynamically take over account code processing responsibilities, and the system can dynamically route calls to alternative servers, maintaining reliability while preserving centralized control through the hierarchical structure.
Solution Approach 2:
The patent prepares for failures by implementing redundant servers at multiple levels (headquarters, area, and site servers) that stand ready to assume backup roles. This beforehand cushioning ensures that when failures occur, the system has pre-configured alternatives that can immediately take over, preventing call disruptions.
3Power
If account code service is distributed across multiple servers, then network load is reduced, but system complexity increases
Solution Approach 1:
The patent makes servers universal by enabling them to perform multiple functions depending on the situation. Servers can handle account code processing, call routing, and failover responsibilities. This multi-functionality allows the system to distribute load across multiple servers while managing complexity through standardized capabilities that all servers share.
4Ease of operation
If account code service is handled centrally, then administration is simplified, but resource allocation efficiency decreases
Solution Approach 1:
The patent applies local quality by allowing different parts of the system to have different levels of account code processing capability based on their location and resources. Site servers handle local account code processing for their specific sites, while area and headquarters servers provide regional and global management. This enables efficient resource allocation locally while maintaining administrative simplicity through the hierarchical structure.
Data Source
AI summary
A voice over internet protocol telephone system is described in which services for handling calls invoking account codes are distributed to voicemail servers in the system. If the voicemail server associated with a particular user does not have services for handling account code calls, then the request is forwarded to another voicemail server in accordance with a predefined procedure.