Regional Emergency Number Allocation for Extension-Only Phones
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Solution Overview
Problem
Extension-only operators traveling internationally face challenges in making emergency calls due to site-level telephone number pools, which are not accessible when they are not at a specified site, posing risks to their safety and health.
Innovation Solution
A telephony system that determines the region-level location of a calling device and distributes a telephone number from a corresponding regional pool for emergency calls, enabling calls to a public safety answering point (PSAP) regardless of the device's physical location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If site-level telephone number pools are used for emergency calls, then emergency calling capability is available at specified sites, but extension-only operators traveling internationally cannot make emergency calls when not at a specified site
Solution Approach 1:
The patent segments the telephone number pool management from site-level to device-level. Each extension-only operator is assigned a pool of telephone numbers that travels with their device, rather than being tied to specific sites. This segmentation enables operators to access emergency calling capability at any location, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The patent makes the telephone number pool universal by allowing it to be used at any location rather than being restricted to specific sites. The system provides multi-functionality by enabling the same telephone number pool to serve emergency calling needs across multiple geographic locations and sites, thereby achieving both reliability and location independence.
2Quantity of substance
If extension-only operators use telephone extensions instead of dedicated telephone numbers, then cost is reduced, but emergency calling capability is lost when traveling outside the home country or region
Solution Approach 1:
The patent applies preliminary action by pre-assigning a pool of telephone numbers to each extension-only operator's device before they travel. This ensures that when the operator needs to make an emergency call abroad, the telephone number is already available and configured, eliminating the reliability issue while maintaining cost efficiency through extension-only operation.
Solution Approach 2:
The system introduces an intermediary mechanism that manages the relationship between extension-only operators and telephone numbers. The service provider's system acts as an intermediary, dynamically allocating and managing telephone number pools for operators based on their location and needs, thereby enabling emergency calling capability without requiring permanent dedicated numbers at each site.
Data Source
AI summary
Location determination and telephone number distribution for emergency calls is enabled by a telephony system which maintains multiple pools of telephone numbers. Each pool corresponds to a different region such that the pools of telephone numbers are defined at the region-level rather than at the site-level. The telephony system determines the location of a calling device initiating an emergency call regardless of whether the calling device is at a known site. Based on the determined location of the calling device, one of the pools of telephone numbers which corresponds to that location is selected. The telephony system thereafter distributes a telephone number for the calling device to use for the emergency call from that selected pool of telephone numbers to facilitate an emergency call between the calling device and a local public safety answering point.