PSTN Voicemail Retrieval via Trigger-Event Data Session
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Users of PSTN phones face challenges in retrieving voicemail messages as they cannot automatically access service information without manual authentication, and existing solutions do not allow for real-time alerts or retrieval during ongoing calls.
Innovation Solution
A method for a device connected to a PSTN line to monitor for trigger events, generate requests for service information updates using a session-based data communications protocol, and send a line identifier for authentication, enabling automatic retrieval of voicemail data even when the line is occupied with a call.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a user manually logs in and provides authentication information to access voicemail, then the service can be securely accessed, but the process becomes time-consuming and requires user intervention
Solution Approach 1:
The device is pre-configured with authentication credentials (username, password, domain) before needing to access voicemail. This preliminary setup allows the device to automatically authenticate with the voicemail server without requiring user intervention at the time of retrieval, thus reducing time loss while maintaining security through pre-validated credentials
2Loss of information
If a device polls the voicemail server frequently to check for new messages, then the user receives timely notifications, but the device complexity and energy consumption increase
Solution Approach 1:
The device implements periodic polling of the voicemail server at predetermined intervals to check for new messages. This periodic action ensures timely notification of voicemail arrivals while maintaining a balanced approach that doesn't require continuous monitoring, thus managing device complexity and energy consumption effectively
3Reliability
If the device uses a connection-oriented protocol to retrieve voicemail, then reliable data transmission is ensured, but the line cannot be used for other communications during the retrieval process
Solution Approach 1:
The communication protocol is segmented into distinct phases: connection establishment, authentication, data retrieval, and connection termination. This segmentation allows the device to efficiently manage the connection-oriented protocol by establishing it only when needed for voicemail retrieval, ensuring reliable data transmission while minimizing the time the line is occupied, thus maintaining adaptability for other communications
4Extent of automation
If the device monitors the PSTN line for trigger events, then automatic voicemail retrieval is enabled, but the device must handle both PSTN signalling and data communications simultaneously
Solution Approach 1:
The device is designed with multi-functionality to handle both PSTN signalling monitoring and data communications over the same physical line. By implementing a universal communication interface that can process both voiceband signalling and modulated data signals, the device achieves automatic voicemail retrieval without requiring separate hardware for each function, thus managing complexity while maintaining automation
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A method for a communications device (12) to successively querying a remote service platform (32) for service information updates, the method comprising at the device: monitoring a PSTN line for a trigger event associated with a PSTN call; determining if a trigger event has occurred, and if so, establishing a data session with the remote service platform; generating a request for a service information update, the request including a calling line identifier for the PSTN line; and sending the request to the remote service platform.