Nowadays, you can see information about fiber optic transceivers everywhere, especially when you are at social media platforms. Take 40G transceiver modules for example, QSFP/QSFP+ transceiver and CFP transceiver are widely used in data center communications to provide high speed and high performance in data transmission. And this publication puts its emphasis on these two types.

The Quad Small Form-factor Pluggable (QSFP) is a compact, hot-pluggable transceiver used for data communications applications in 40 Gigabit per second links. QSFP connectors provide four channels of data in one pluggable interface. Each channel is capable of transferring data at 10Gb/s and supports a total of 40Gb/s as specified for QSFP+. The QSFP specification accommodates Ethernet, Fibre Channel, InfiniBand and SONET/SDH standards with different data rate options. QSFP+ transceivers are designed to carry Serial Attached SCSI, 40G Ethernet, QDR (40G) and FDR (56G) Infiniband, and other communications standards. QSFP modules offer customers a wide variety of high-density 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, and service provider transport applications.

QSFP/QSFP+ optical transceivers support both single-mode and multi-mode fibers. They are intended to work with a distance up to 40 km or more over single-mode fibers and 400 m over multi-mode fibers. They are compliant with different optical connectors, such as duplex LC and MPO/MTP. IEEE uses such letters like LR (long reach) and SR (short reach) to describe optical transceivers. One of the most commonly-used types of QSFP/QSFP+ optical transceivers is QSFP-40G-SR4. Like FTL410QE2C, Fiberstore compatible Finisar FTL410QE2C is designed for use in 40 Gigabit per second links over multi-mode fiber.

Other Fiberstore compatible QSFP-40G-SR4 transceivers with major brands include E40GQSFPSR, F5-UPG-QSFP+, etc.

The C form-factor pluggable (CFP) is a hot-pluggable transceiver module form factor that supports a wide range of 40Gb/s and 100Gb/s applications such as 40G and 100G Ethernet. More often, CFP transceiver is used to support 100Gb/s applications. It is specified by a multi-source agreement (MSA) between competing manufacturers to produce a common form-factor for the transmission of high-speed digital signals.

Along its upgrade, there appeared its two followers—CFP2 and CFP4. As detailed in the MSA, it supports 40Gb/s applications over both single-mode and multi-mode fibers, protocols, and various link lengths, including all the physical media-dependent (PMD) interfaces. As for its features, it boasts of advanced thermal management, EMI management and enhanced signal integrity design, as well as a MDIO-based management interface. The widely used 40G CFP transceiver is the CFP-40G-SR4. 40GBASE-SR4 CFP module supports link lengths of up to 100m and 150m, respectively, over laser-optimized OM3 and OM4 multi-mode fiber cables. It enables high-bandwidth 40 Gigabit Ethernet optical links over ribbon fiber cables terminated with female MPO/MTP 12-fiber connectors. This CFP module supports IEEE 40GBASE-SR4 standard only.

CFP and QSFP/QSFP+ transceivers offer customers 40 Gigabit Ethernet connectivity options for data center networking, enterprise core aggregation, and service provider transport applications. Fiberstore offers various 40G CFP and QSFP/QSFP+ optical transceivers, including 40GBASE-SR4 CFP, FTL410QE2C, E40GQSFPSR, F5-UPG-QSFP+, mentioned above. For more information about 40G optical transceivers, please visit Fiberstore.

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