Dynamic CLI Modification for Multi-Protocol Phone SNR
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Solution Overview
Problem
Multi-protocol telephones with cellular capability do not fully support Single Number Reach (SNR) functionality and fail to integrate call-handling features, as incoming calls to the cellular number bypass the call-handling device, leading to denied call-handling features and SNR functionality for return calls.
Innovation Solution
Implementing a Presentation CLI table mechanism that associates cellular phone numbers with call-handling device phone numbers, ensuring all calls, including return calls, are identified by the call-handling device number, allowing for SNR functionality and mid-call switching between cellular and IP networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all outbound mobile calls are forced to connect with the call-handling device before delivery to endpoint, then return calls can be routed through the call-handling device for full SNR functionality, but deployment costs increase and new hardware is required in the cell phone and/or call handling device
Solution Approach 1:
The patent changes the parameter of call identification by dynamically modifying the CLI field content based on call direction. For outbound calls, the CLI presents the mobile phone number; for return calls, the CLI presents the call-handling device number. This parameter change enables full SNR functionality without requiring forced call routing through the call-handling device for all calls, thus avoiding additional deployment costs and hardware requirements.
2Loss of information
If outbound calls present the mobile phone number in the CLI field, then the called party can identify the mobile number, but return calls bypass the call-handling device and lose SNR functionality
Solution Approach 1:
The patent applies dynamics by making the CLI field content dynamic rather than static. The CLI field automatically adjusts its content based on the call direction: it presents the mobile phone number for outbound calls and the call-handling device number for return calls. This dynamic adaptation resolves the contradiction between providing accurate calling number identification and maintaining call-handling functionality.
Solution Approach 2:
The call-handling device acts as an intermediary that intercepts return calls and reroutes them through itself. When a called party dials the number presented in the CLI field, the call is directed to the call-handling device, which then determines whether to route the call to the mobile phone or another endpoint. This intermediary mechanism ensures that return calls maintain SNR functionality while still allowing the called party to identify the original mobile number.
3Measurement precision
If the cellular network provides the mobile phone number in the CLI field, then the called endpoint receives accurate calling information, but the return call cannot be routed through the call-handling device for SNR features
Solution Approach 1:
The patent makes the CLI field content dynamic, changing it based on call direction. For outbound calls, the CLI accurately presents the mobile phone number. For return calls, the CLI dynamically switches to present the call-handling device number. This dynamic behavior maintains CLI accuracy for the current call context while enabling call-handling integration for return calls.
Data Source
AI summary
In one embodiment, a system identifies an Internet Protocol (IP) device as a calling party for calls from either a Voice over Internet Protocol (VoIP) portion or a cellular portion of a multi-protocol phone. As a result, return calls to the multi-protocol phone are always sent through an IP device to allow call handling or Single Number Reach (SNR) functionality for the return calls.