SFP+ Connector Signaling Using an Extra Contact for Control Tones
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Solution Overview
Problem
High-speed data connectors, such as Enhanced Small Form-factor Pluggable (SFP+) transceivers, face challenges in efficiently utilizing pins for both high-speed data transmission and status/control functions, necessitating alternative methods to reassign pins and maintain signal integrity.
Innovation Solution
The implementation of a method and apparatus that utilize an additional contact adjacent to the standard SFP+ connector contacts to transmit distinct tones for control or status signals, allowing for the reuse of pins previously dedicated to low-speed functions, thereby doubling data flow without increasing signaling speed and maintaining signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pins are re-assigned from status and control functions to high-speed data transmission, then data transmission capacity is improved, but status and control signal functionality deteriorates
Solution Approach 1:
The patent introduces a new spatial dimension by placing an additional contact adjacent to the standard SFP+ connector contacts. This additional contact provides a dedicated path for status and control signals, allowing the original pins to be re-assigned to high-speed data transmission without losing control functionality. The problem is solved by adding a dimension (additional contact) rather than competing for the same resources.
Solution Approach 2:
The patent segments the signaling functions by separating high-speed data transmission from status and control signaling. High-speed data is transmitted through the standard differential pairs, while status and control signals are transmitted through the additional contact using distinct tones. This segmentation allows each function to operate independently without interference.
2Productivity
If additional contacts are added adjacent to standard connector contacts, then data capacity is improved, but connector complexity deteriorates
Solution Approach 1:
The patent applies local quality by adding only one specific contact in a specific location (adjacent to the standard SFP+ connector contacts) rather than redesigning the entire connector. The additional contact is precisely positioned to provide the needed functionality while minimizing disruption to the existing connector structure and compatibility.
3Loss of information
If distinct tones are transmitted over additional contacts, then signal differentiation is improved, but interference risk deteriorates
Solution Approach 1:
The patent replaces traditional electrical signal transmission with acoustic tone transmission over the additional contact. By using distinct audible tones (frequencies) to represent different status and control signals, the system achieves better signal differentiation and immunity to electrical interference. The tone generator converts electrical signals to acoustic tones, and the tone detector converts them back, providing a robust signaling mechanism.
Data Source
AI summary
An apparatus and method for signaling and transmitting data through an optical link is described. The apparatus may include a connector including a first plurality of contacts compatible with an enhanced SFP (SFP+) connector. The connector further includes an additional contact formed at a space adjacent to the first plurality of contacts. A tone generator couples to the additional contact to receive a first signal and to generate a first distinct tone indicative of the first signal for transmission via the additional contact. The method may include generating a first distinct tone indicative of a first signal providing control or status of an apparatus and transmitting or receiving a differential data signal over a portion of a first plurality of contacts compatible with an enhanced SFP (SFP+) connector. The first distinct tone is transmitted over the additional contact formed in a space adjacent to the first plurality of contacts.