40GBase-ER4 QSFP+ Transceiver Module: How Much Do You Know?

FiberMall 40G QSFP+ ER4 Optical Module


QSFP+ stands for Quad Small Form-Factor Pluggable Plus. A parallel and hot-swappable fiber optical module that provides high-density 40G connectivity options for high-performance computing networks and modern data centers. It has four independent receive and transmit optical channels that can terminate to another 40G QSFP+ transceiver, or can be distributed to four separate 10 Gigabit SFP+ transceivers. The QSFP+ modules , in brief, connect the entire electrical circuitry of your system to an optical external network.


  • What is 40G QSFP+ ER4?

The 40GBase-ER4 module can handle long distance transmission of data up to 40kms over SMF fiber with duplex LC connectors. The module converts 4 inputs channels of 10Gb/s electrical data to 4 CWDM optical signals and multiplexes them into a single channel for 40Gb/s optical transmission.  On the receiving end of the module, the single 40G input is demultiplexed into four CWDM signals, then transforms them to a four channel electrical data output. The design is compliant to 40GBASE-ER4 of the IEEE P802.3ba standard. The central wavelengths of the 4 CWDM channels are 1271, 1291, 1311, and 1331 nm as members of the CWDM wavelength grid defined in ITU-T G694.2. It contains a duplex LC connector for the optical interface and a 38-pin connector for the electrical interface.


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