GIGALIGHT 128GFC QSFP28 eSR4 optical transceiver modules are used for short-haul interconnections between network devices in internal storage areas of data centers. They are compliant with 128GFC/4x32GFC transport protocols, and are compatible with 40G/100G Ethernet, InfiniBand FDR/EDR, and OTN OTU4 transport protocols. The series is an enhanced version of the 128GFC QSFP28 SR4, which uses 4 pairs of parallel multimode fiber transmission with a central wavelength of 850nm for distances of up to 200m (OM3) or 300m (OM4), with an optional industrial-grade operating temperature range.
