What is the difference between SFP、SFP+、QSFP?

 SFP, SFP+ or QSFP are all types of transceivers used to connect a switch or other network device to copper or fibre cable. They are most commonly used to add fibre ports. Which SFP transceiver you choose depends on the cable type, application, required optical range for the network and the desired data transmission rate.





What is an SFP?

An SFP, or small form factor pluggable, is a compact, hot-swappable transceiver designed to support 100/1000Mbps Ethernet, Fibre Channel and SONET, among other communication standards. SFP transceivers support speeds up to 4.25Gbps and are commonly used in telecommunications and data communications applications. SFP ports are found in a range of devices, from Ethernet switches to routers, NIC cards and firewalls. Small form factor pluggable specification is based on IEEE802.3 and SFF-8472.

SFP vs SFP+

SFP and SFP+ transceivers are virtually identical in size and appearance. The primary difference is that SFP+ is an updated version that supports higher speeds up to 10Gbps. The difference in data rate also accounts for a difference in transmission distance—SFP typically has a longer transmission distance. SFP+ specifications are based on SFF-8431. In terms of SFP vs SFP+ compatibility, SFP+ ports often accept SFP optics but at a reduced speed of 1Gbps. Be aware, however, that you cannot plug an SFP+ transceiver into an SFP port because SFP+ does not support speeds less than 1Gbps.

GBIC vs SFP

Prior to SFP and SFP+, the most common transceivers were gigabit interface converters, or GBICs. SFP, sometimes called mini-GBIC, replaces GBIC because of its smaller size.

What is a QSFP Port?

QSFP, or quad small form factor pluggable, is another type of compact, hot-swappable transceiver. It supports Ethernet, Fibre Channel, InfiniBand and SONET/SDH standards with different data rate options. QSFP modules are commonly available in several different types: 4x1Gbps QSFP, 4x10Gbps QSFP+, 4x28Gbps QSFP28.

QSFP+ andQSFP28 are the most recent versions, which support numerous 40Gbps and 100Gbps applications. Both QSFP+ and QSFP28 modules integrate 4 transmit and 4 receiver channels. While QSFP+ supports 4x10Gbps or 1x40Gbps, QSFP28 can do 4x25Gbps, 2x50Gbps or 1x100Gbps, depending on the transceiver used. The specifications for QSFP are based on SFF-8436.

How to Choose SFP Transceivers?

In addition to SFP vs SFP+ vs QSFP, you’ll also need to consider the application. SFP transceivers are available in different types depending on what they will be used for, for example single-mode vs multimode SFP. Single-mode SFP transceivers work with single-mode fibre, whereas multimode SFPs are compatible with multimode fibre. Additionally, there are long-reach WDM SFP transceivers for multiplexing, simplex SFPs for single fibre applications, video SFP transceivers for transmission of high-definition video, and PON SFP transceivers for fibre-based access networks. SFPs are available in commercial and extended operating temperature ranges, with or without extended diagnostics capabilities.

评论

发表评论

此博客中的热门博文

How Liquid Sachet Packaging Machines Revolutionize Production

图片
    Liquid sachet packaging machines have become indispensable in various industries, streamlining production processes and meeting consumer demands efficiently. But why are these machines so crucial, and what benefits do they offer? Let's delve into the intricacies of liquid sachet packaging machines and explore how they address common customer concerns.   What are  Liquid Sachet Packaging Machines ?   Liquid sachet packaging machines are specialized equipment designed to package liquids such as beverages, sauces, oils, and detergents into convenient sachets. These machines automate the process of filling, sealing, and labeling sachets, ensuring consistent quality and minimizing human error.   Why Choose Liquid Sachet Packaging Machines?   1. Precision and Efficiency: Liquid sachet packaging machines offer precise control over filling volumes, ensuring each sachet contains the exact amount of product. This precision eliminates product wastage and enhances production efficiency.  
阅读全文

Investment Casting vs. Die Casting: Which Is Right for Your Application

图片
    Casting is an ancient manufacturing technique that dates back to the 1890s. Two common casting techniques available today are investment casting and die casting. Although these technologies share the same basic principles, investment casting has specific differences from die casting. Investment casting involves injecting wax into an aluminum mold cavity. The die casting process, on the other hand, forces molten metal under high pressure into the mold cavity. This article will provide an overview of these technologies, including their main advantages. You'll also learn the differences between investment casting and die casting to help you choose the best option for your project. Detailed Comparison: Investment Casting Vs Die Casting work process The  precision custom casting  process begins with making a wax pattern that is used to produce the desired end product. The operator then attaches wax to the base of the sprue and repeatedly dips them into the ceramic mold. After the ce
阅读全文

Best Practices for Applying Cold Lamination Film

图片
  In the ever-evolving landscape of document protection and graphic enhancement, cold lamination has emerged as a versatile and efficient solution. Whether you are safeguarding important documents or enhancing the vibrancy of graphics, applying   cold lamination film   requires finesse and attention to detail. In this comprehensive guide, we unveil the best practices that will elevate your cold lamination process, ensuring a flawless finish that stands the test of time. Before we dive into the best practices, let's establish a foundational understanding of cold lamination. Unlike its hot counterpart, cold lamination utilizes pressure-sensitive adhesives to bond the film to the surface. This makes it an ideal choice for heat-sensitive materials, such as documents and graphics produced with inkjet printers. Selecting the Right Cold Lamination Film The success of your lamination project hinges on choosing the right film. Consider the following factors: 1. Film Thickness Choose a film
阅读全文