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SFP vs. SFP+ vs. QSFP

Uploaded2021/9/22 0:00:00     Hits    Source

Nowadays, there are many specifications of fiber optic transceivers available in the market, such as SFP, SFP+, and QSFP and so on. So how do you choose between them? This article will introduce their differences to you.

What is SFP?

SFP stands for Small Form-factor Pluggable. It is also usually called mini-GBIC (Gigabit Interface Converter). It is a compact, hot swappable transceiver designed to support 100/1000Mbps Ethernet, Fibre Channel, SONET and other communication standards. SFP is suitable for copper cables or optical fibers, supports speeds up to 4.25Gbps, and is commonly used in telecommunications and data communication applications.

1.25G SFP Optical Module

What is SFP+?

SFP+ stands for Enhanced Small Form-factor Pluggable and is an enhanced version of SFP. SFP+ supports 8 Gbit/s Fibre Channel, 10 Gbit Ethernet and optical transmission network standard OTU2, and supports data rates up to 16 Gbit/s. It is a popular industry format supported by many network component vendors.

10G Bi-Directional SFP+ Optical Transceiver

What is QSFP?

QSFP stands for Quad Small Form-factor Pluggable. It is a compact, hot-swappable fiber optic transceiver for 40 Gigabit Ethernet data communication applications. Network administrators are now migrating to 40G, and QSFP transceivers are an important component to ensure high-speed Internet.

40 GB/s 40km QSFP+ Transceiver

Difference between SFP, SFP+, QSFP

The size and appearance of SFP and SFP+ transceivers are almost the same. The main difference is that SFP+ is an updated version. SFP usually supports 1.25 Gbit/s to 4.25 Gbit/s, while SFP+ supports data rates up to 10 Gbit/s. The specification of SFP+ is based on SFF-8431, and SFP is based on the standards of IEEE802.3 and SFF-8472. SFP+ transceiver cannot be inserted into the SFP port, otherwise the product or port will be damaged.

40G QSFP optical module can provide four transmission channels, and the data rate of each channel is 10Gbps. Compared with SFP+ optical modules, QSFP modules can increase port density by four times.


There are different types of SFP transceivers, depending on their purpose. After you have a clear understanding of them, you must also consider your network traffic, transmission distance, and network requirements to ensure the correct choice.

Baudcom offers all types of fiber optic transceivers. For more information, please visit Baudcom.

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