Compact SFP Receptacle Design for Universal Module Compatibility
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Solution Overview
Problem
Conventional SFP modules and traditional compact SFP modules lack backwards compatibility, limiting their ability to function with older systems and restricting the number of optical connections they can establish.
Innovation Solution
A compact SFP module design that includes a receptacle capable of receiving both conventional and compact SFP modules, utilizing a low-pass filter to detect module presence and transmit data through a single pin, allowing for dual or single duplex connections depending on the module type, while maintaining compatibility with existing pin configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a receptacle is designed to receive both conventional SFP modules and compact SFP modules, then compatibility with both module types is improved, but the complexity of the receptacle design increases
Solution Approach 1:
The receptacle is designed with a universal interface that can accommodate both conventional SFP modules and compact SFP modules. The same receptacle and pin configuration (pins 1-20) are used for both module types, allowing the host device to work with either module type without requiring separate receptacles or design modifications.
Solution Approach 2:
Instead of designing separate receptacles for conventional and compact modules, the approach is inverted by making the receptacle universal and allowing different module types to interface through the same pin configuration. The system accommodates both types through a single standardized interface rather than requiring specialized receptacles for each type.
2Device complexity
If a single pin is used to transmit both module detection signal and data, then the number of pins required is reduced, but signal interference may increase
Solution Approach 1:
The patent combines multiple functions into a single pin interface. Pin 20 is used for both module detection signaling and data transmission depending on the module type. This merging reduces the overall pin count requirements while maintaining full functionality for both conventional and compact module operations.
Solution Approach 2:
The pin configuration is made dynamic rather than static. The same pin (pin 20) serves different purposes based on which module type is detected and inserted. The system dynamically assigns the pin's function - either for detection signaling with conventional modules or for data transmission with compact modules - rather than dedicating separate pins for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables host devices to seamlessly integrate both conventional and compact SFP modules, providing either two or one duplex optical connections based on the module type, enhancing compatibility and adaptability without requiring additional pins.
Implementation Method 1
A low pass filter is coupled to the pin of the first connector. The low pass filter is configured to pass the module detection signal to the node.
Data Source
AI summary
An apparatus, in accordance with particular embodiments, includes an interface configured to establish connections within a copper network. The apparatus also includes a receptacle configured to receive a conventional small form-factor pluggable (SFP) module or a compact SFP module and to direct the SFP modules to a first connector. The first connector connects either of the SFP modules to the node. A pin of the first connector is configured to receive a module detection signal and to transmit data to the compact SFP module. The apparatus also includes a low pass filter coupled to the pin of the first connector that passes the module detection signal to the node. The apparatus is further configured to establish two duplex connections with an optical fiber network if the compact SFP module is connected and to establish one duplex connection with the optical fiber network if the conventional SFP module is connected.