Mellanox 40G QSFP+ Optics – How Much Do You Know?

In response to the growing demands for bandwidth needed in today’s networking environment, the IEEE approved the 802.3ba Ethernet standard in June 2010. One of the speeds chosen by 802.3ba was 40Gbit/s to support both end-point and link aggregation needs. In this blog, discussion will delve into Mellanox 40G QSFP+ optics. How much do you know about them?

About Mellanox 40G QSFP+ Optics

Mellanox Technologies is committed to extending the quality into every aspect of their businesses, including cables, transceivers and semiconductors. Mellanox 40G QSFP+ optics include Mellanox QSFP+ and Mellanox 40Gb/s cables. Mellanox QSFP+ and 40Gb/s cables make 40Gb/s deployments as easy as 10Gb/s. A wide range of Mellanox 40G products support Ethernet and InfiniBand applications. These products are compliant with IEEE standards, and they are 100% tested on Mellanox equipment to ensure optimal signal integrity and the best end-to-end performance. With Mellanox 40G QSFP+ optics, better 40Gb/s network performance is ensured.

Mellanox QSFP+ Transceivers

Mellanox QSFP+ transceivers are designed to provide outstanding performance in high bandwidth applications such as 40G Ethernet and QDR, with speeds up to 40Gb/s and reaches up to 30 meters. Each of Mellanox QSFP+ has four channels for full-duplex operation, each channel working at data rates of up to 10.3125Gb/s, thus giving an aggregated bandwidth up to 40Gb/s. Take MC2210411-SR4, this Mellanox MC2210411-SR4 transceiver listed on Fiberstore is designed to support link lengths of 100m over multi-mode fibers (MMF), using MTP/MPO connector type at a wavelength of 850nm.

Mellanox 40Gb/s Cabling Options

Mellanox cables are a cost-effective solution for connecting high-bandwidth fabrics, extending the benefits of Mellanox’s high-performance InfiniBand and 40 Gigabit Ethernet adapters throughout the network. This article mainly introduces three Mellanox 40Gb/s cabling options: direct attach copper cable, active optical cables (AOCs) as well as hybrid copper cables.

Direct attach copper cables, a kind of direct attach cable (DAC), are designed in either active or passive versions. Mellanox passive copper cables provide highly reliable, low-cost solutions when the required link length is short.

Mellanox AOCs are the optimized solution for point-to-point links from 5m to 200m. Suitable for both Ethernet and InfiniBand applications, AOCs are as easy to install as copper cables. AOCs have the advantage of longer reaches, lighter cabling and more flexible routing compared with direct attach copper cables.

Hybrid cables connect network equipment with different connector types, like QSFP to 4 SFP+ breakout cables. Mellanox’s hybrid QSFP+ to 4x SFP+ passive copper cables (just as the figure shown below) are 40Gb/s to 10Gb/s cable assemblies. The cables are compliant with SFF-8431 and SFF-8436 specifications and provide connectivity between devices using QSFP+ port on one end and multiple SFP+ ports on the other end. This kind of cabling solution enables 40GbE systems to connect to 10GbE switches or adapter cards, reducing power consumption and increasing the connectivity opportunities of the system.

About Fiberstore Compatible Mellanox 40G QSFP+ Optics

Fiberstore is a professional manufacturer and supplier of optical fiber products, including transceivers and cables. As a third-party, Fiberstore 40G QSFP+ optics are fully compatible with major brands, such as Mellanox, Cisco and Juniper. Using compatible Mellanox 40G QSFP+ optics, besides saving the cost, you can also enjoy trouble-free operation in your 40Gigabit application.


Mellanox 40G QSFP+ optics deliver high performance, great reliability, and flexibility of product choices for 40Gigabit links. Fiberstore supplies a large number of Mellanox QSFP+ (eg. MC2210411-SR4 mentioned above). You can visit Fiberstore for more information about Fibersotre 100% compatible 40G QSFP optics with Mellanox.


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