How to Convert QSFP+ to SFP+ Port

In modern networking and data communication, conversion between various port types like Quad Small Form-Factor Pluggable Plus (QSFP+) and Small Form-Factor Pluggable Plus (SFP+) becomes necessary. Several methods enable this conversion, and each one brings unique characteristics to the table.

QSFP+ to SFP+: MTP to LC Breakout Cable

The MTP to LC breakout cable provides a smooth transition between QSFP+ and SFP+ connections. It uses an MTP connector on one end for the QSFP+ port and multiple LC connectors for the SFP+ end. Selection requires care in identifying compatible cables, considering the length and material for signal quality, and ensuring the devices support the conversion. Simply plug the MTP end into the QSFP+ port, connect the LC connectors to corresponding SFP+ ports, and align the settings on both devices.

40G QSFP+ to 10G SFP+ Breakout

QSFP+ to SFP+: QSFP+ to SFP+ DAC and AOC Cable

Direct Attach Cables (DAC) and Active Optical Cables (AOC) offer another straightforward way to achieve the QSFP+ to SFP+ conversion. For DAC, choose a cable that meets the specifications of both devices and connect the QSFP+ end to the QSFP+ port and the SFP+ end to the SFP+ port. AOC follows a similar process but can support longer connections. Always weigh the distance, price, and performance when selecting between DAC and AOC.



CVR-QSFP-SFP10G, known as QSA (QSFP to SFP Adapter), is a specially designed module that enables QSFP+ ports to utilize SFP+ transceivers. It’s a simple procedure involving the insertion of the QSA module into the QSFP+ port, plugging an SFP+ transceiver into the QSA, and connecting the suitable cable to the SFP+ transceiver. Check for compatibility and performance differences in this conversion, as not all devices and transceivers may work seamlessly with the QSA module.

How to Make the Best Choice to Convert QSFP+ to SFP+

Selecting the ideal method to convert QSFP+ to SFP+ is a multi-faceted decision that relies on understanding specific requirements. The key elements to consider in this decision-making process are the transmission distance, port density, and solution cost.

Transmission Distance

The transmission distance plays a pivotal role in choosing the conversion method. If shorter distances are needed, a flexible option like an MTP to LC breakout cable may be suitable, though it can experience signal loss over longer stretches. For those looking to connect devices closer together, DAC is an effective choice, whereas AOC is designed to accommodate longer connections without noticeable signal loss. If a variety of distances need to be supported, the QSA module offers flexibility, with the choice of SFP+ transceiver determining the possible transmission range.

Port Density

Consideration of port density is vital for network scalability and future growth. The use of an MTP to LC breakout cable may influence overall port density since it requires multiple LC connectors for each QSFP+ port. On the other hand, DAC and AOC provide a straightforward one-to-one connection between QSFP+ and SFP+ ports, generally without impacting port density. Those seeking adaptable solutions might opt for QSA modules, allowing for various port densities by fitting different types of SFP+ transceivers.

Solution Cost

The cost of the conversion solution is often a determining factor in selection. An MTP to LC breakout cable is typically more budget-friendly but may require additional components, leading to increased costs. DAC is a cost-effective choice for shorter distances, while AOC, though more expensive, is suitable for longer connections. For more complex or expanding networks, the QSA module, although a higher initial investment, can be a versatile and potentially cost-effective solution in the long run.


The process of converting QSFP+ to SFP+ offers multiple paths, each with unique considerations and applications. From MTP to LC breakout cables to DAC and AOC cables and QSA modules, the conversion can be performed effectively. Careful assessment of individual needs and constraints will guide the best choice, ensuring network performance and coherence in various system environments.


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