The QSFP28 100G-CWDM4-10km module is a highly integrated 4x28G transceiver focused on reach, bandwidth, density and cost for high port-count 100G systems, and client-side 100G interfaces. It is compliant with the 100G 4WDM-10 MSA, which is based on the CWDM4 MSA version 1.1 but alters some of the specifications to extend the link reach from 2 km to 10 km. It is interoperable with CWDM4 transceivers over a 2 km reach.

Reach: 10 km via SMF
Optical link budget: Supports 6.5 dB of link budget
Link budget assumes the use of KR4 FEC by the host
Uncooled CWDM DFB lasers, directly modulated
Electrical interface: retimed CAUI-4 per 100G Ethernet IEEE 802.3bm Annex 83E
User controllable Transmit Input Equalization and Receiver Output Amplitude
MSA-compliant performance monitoring via I2C interface
Fiber connector: SMF LC duplex connector
Hot-pluggable
RoHS6 compliant (lead-free)

100G CWDM4 Ethernet
InfiniBand 4x EDR

Parameter Name	Parameter Value
Network	Ethernet
Applications	for fiber optics
Other characteristics	QSFP