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What is SFP and How to Use It?

Uploaded2021/8/17 1:53:52     Hits    Source

What is an SFP?

SFP stands for small form-factor pluggable. Simply put, it is a small transceiver that can send and receive data through optical fiber. It is a compact optical transceiver module used in telecommunications and data communication systems. It helps to seamlessly convert Ethernet signals into optical signals to transmit and receive data. Moreover, the SFP module is hot-swappable, which makes it easy to adjust the existing network without redesigning the entire cable infrastructure.

1.25G SFP Optical Module

Types of SFP


1310/1550 nm = Single Mode (9/125 μm)

850/1300 nm = Multimode (50/125 μm)


SFP modules support up to 4.25 Gbps.

SFP+ modules (enhanced small form-factor pluggable) support up to 16 Gbps.

SFP28 modules can handle 25 Gbps over one channel.

Applications of SFP

In the field of fiber optics, applications cover anything that may involve high-speed and/or long-distance cables. High-definition audio transmission and reception, passive optical networks (PON), multiplexing and simplex networks are the most common uses of this technology. The variability of SFP allows it to provide modules for any of these connections, and offers a range of options in terms of cost, speed, range, and accessibility.

Where is an SFP port located?

You can find SFP ports on network devices (such as switches, servers, routers, network interface cards, or computers). Most switches used in large computer network applications have at least two SFP ports. These switches are sometimes called SFP switches.

How to Use It?

When the SFP port on the switch is embedded in an optical SFP module with an optical port, an optical fiber link (SMF optical fiber/MMF optical fiber) with a duplex LC connector is required to support the connection.

SFP ports and their corresponding SFP modules are used to facilitate seamless, high-speed data communications or long-distance telecommunications connections in various applications. They are commonly used to connect one gigabit network switch to another network switch, which in turn increases the size of the network and improves the functionality of the network. This is helpful in military, industrial, and commercial environments, where many devices in a wide area require wired, high-speed, and reliable connections.


SFP ports are an important part of high-speed telecommunications and data communications, especially in large-scale network environments. It is important to remember that the ultimate goal of SFP ports is to facilitate a reliable, wired, high-speed connection between two devices via copper or fiber optic cables.

Baudcom offers all kinds of fiber optic SFP modules. For more information, please visit Baudcom.

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