Driven by increasing demands for higher speed and performances in telecommunication applications, qualified optical products have been designed constantly. Take optical transceivers for example, their deployment in data communication have made 40Gbit/s or even 100 Gbit/s transmission possible. And this post will touch on 40G transceiver modules used for 40G Ethernet transmission, CFP transceiver and QSFP/QSFP+ transceiver.

CFP Transceiver
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.

QSFP/QSFP+ Transceiver
The Quad Small Form-factor Pluggable (QSFP) is a compact, hot-pluggable transceiver used for data communications applications in 40 Gigabit per second links. The 40 Gb/s QSFP+ transceiver is a fiber optical module with four channels. 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/QSFP+ Products
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. Commonly-seen types of QSFP/QSFP+ optical transceivers are QSFP-40G-PLR4, QSFP-40G-CSR4, 40GBASE-PLRL4, QSFP-40G-LR4, and QSFP-40G-SR4. For example, 40GBASE-SR4 QSFP+ 850 nm 150 m Transceiver Module for Multi-Mode Fiber (MMF) is widely used in proprietary backplanes, 40GBASE-SR4 applications, server-server clusters and super-computing interconnections.

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 can provide those above-mentioned 40G CFP and QSFP/QSFP+ optical transceivers. For more information about optical transceivers, please visit Fiberstore.

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