Telephony Node Network Selection Via Session Type Detection
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Solution Overview
Problem
Existing telephony systems struggle to adapt to jurisdictions that require the use of the public switched telephone network (PSTN) for external communications, while also needing to utilize Voice over Internet Protocol (VOIP) for intra-premises communications to improve audio quality and allow PSTN operators to collect tolls.
Innovation Solution
Implementing an on-premises telephony node coupled with an on-premises session border controller (SBC) that handles PSTN communications. The SBC processes audio communications via the PSTN, stores call detail records for compliance, and determines whether to initiate a VOIP or PSTN session based on the communication type and destination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If VOIP is used for external communications, then audio quality and cost efficiency improve, but regulatory compliance deteriorates in jurisdictions requiring PSTN usage
Solution Approach 1:
The telephony node dynamically selects between VOIP and PSTN networks based on the communication destination and regulatory requirements. For external stations, it routes audio through PSTN to ensure compliance while maintaining VOIP for internal communications, creating a flexible adaptive system that meets both quality and regulatory demands
Solution Approach 2:
The system segments communication traffic into different types (internal vs external, audio vs video) and applies different network paths accordingly. Internal communications use VOIP while external communications use PSTN for audio, allowing each segment to optimize for its specific requirements without compromising the other
2Adaptability or versatility
If PSTN is used for all external communications, then regulatory compliance is ensured, but audio quality and operational efficiency deteriorate
Solution Approach 1:
The system applies different quality characteristics to different parts of the communication system. PSTN is used specifically for audio communications with external stations to ensure compliance, while VOIP is used for internal communications and video components where higher quality and efficiency are needed, allowing each component to have optimal local quality
3Device complexity
If a single network path is used for all communications, then device complexity is reduced, but adaptability to different communication types and regulatory requirements deteriorates
Solution Approach 1:
The telephony node autonomously determines the appropriate network path by examining the session initiation request and destination station information. It automatically selects between VOIP and PSTN without requiring manual configuration or complex external control systems, maintaining simplicity while achieving adaptability through intelligent self decision-making
Data Source
AI summary
A telephony node determines whether a session initiation request is associated with audio or video communication with an external station. The telephony node determines a session type for a session based on whether the session initiation request is associated with the audio or video communication with the external station, the session type comprising at least one of a public switched telephone network session or a Voice over Internet Protocol session. The telephony node causes initiation of the session based on the determination of the session type.