DTMF Signal Conversion in MoIP Networks
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Solution Overview
Problem
Interoperability challenges arise in MoIP networks due to varying protocols for encoding DTMF signals, as network equipment and software vendors typically support only a limited subset of DTMF signaling methods, hindering seamless integration and communication across different vendor systems.
Innovation Solution
A session exchange device with a DTMF management engine processes and converts DTMF packets by determining the destination endpoint's protocol and applying a DTMF conversion policy, modifying or producing new packets to ensure compatibility across different layers and protocols within the MoIP network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If network equipment and software vendors support only a limited subset of DTMF signaling methods, then device complexity is reduced and ease of manufacture is improved, but interoperability between different vendor systems deteriorates
Solution Approach 1:
The patent introduces a session exchange device as an intermediary component that performs DTMF signal conversion between different protocol layers. This mediator translates DTMF signals from one protocol format to another, enabling interoperability between network equipment from different vendors without requiring each device to support all possible DTMF signaling methods, thus resolving the contradiction between ease of manufacture and interoperability
Solution Approach 2:
The session exchange device is designed with multi-functional capability to handle multiple DTMF signaling protocols and perform conversions between them. This universal device can interface with various vendor-specific implementations while maintaining standardized communication, allowing a single device to work across different protocol environments without increasing complexity at the endpoint devices
2Adaptability or versatility
If multiple protocol configurations are supported for DTMF signal encoding, then adaptability and interoperability are improved, but device complexity and difficulty of operation increase
Solution Approach 1:
The patent segments the DTMF signal processing function into separate components: endpoint devices that generate or receive DTMF signals using simple protocol support, and a session exchange device that handles the complex protocol conversion. This segmentation allows endpoint devices to remain simple while the intermediary handles the complexity of multiple protocol configurations, resolving the contradiction between adaptability and device complexity
3Adaptability or versatility
If protocol conversion is performed at the session exchange device, then interoperability between different layers is improved, but processing time and loss of time increase
Solution Approach 1:
The session exchange device is pre-configured with conversion rules and protocols for multiple DTMF signaling methods. By having the conversion capabilities prepared in advance, the device can perform protocol translations quickly without requiring complex real-time decision-making or configuration, thus reducing the time penalty associated with interoperability conversions
Data Source
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AI summary
In one embodiment, a method includes receiving a first internet protocol (IP) packet having information associated with a dual-tone multi-frequency (DTMF) signal. The information of the first IP packet is configured based on a protocol associated with a first layer of a media over internet protocol (MoIP) network. The first IP packet is associated with a destination endpoint. The method also includes producing a second IP packet having information associated with the DTMF signal. The information of the second IP packet is configured based on a protocol associated with a second layer of the MoIP network and a DTMF conversion policy associated with the destination endpoint. The second layer is different than the first layer.