?Widely Application? It's fully compliant QSFP28 MSA, RoHS-6, IEEE 802.3bm 100GBASE-SR Bi-Directional standards. It utilizes a standard LC duplex fiber cable allowing reuse of existing cable infrastructure, widely used on 100 Gigabit Ethernet, Datacom/Telecom switch & route connections in large data centers Interconnect, high-performance computing networks, enterprise core and distribution layer applications. ?SR4 vs SR BiDi?The main difference between 100GBASE-SR4 QSFP28 and 100GBASE-SR BiDi QSFP28 is the transmission and connector type. The 100GBASE-SR4 QSFP28 adopts wavelength 850nm transmission with MTP/MPO connector; while the100GBASE-SR BiDi QSFP28 adopts wavelenghth 850nm&900nm transmission with LC duplex connector. but the Max Cable Distance is as the same as 100m on OM4 / 70m@OM3 on the multimode fiber cable MMF. ?Connectors? The transceiver internally multiplexes an XLPPI 4x25G interface into two 50Gb/s electrical channels, transmitting and receiving each optically over one simplex LC fiber using bi- directional optics. This results in an aggregate bandwidth of 100Gbps into a duplex LC cable. This allows reuse of the installed LC duplex cabling infrastructure for 100GbE application. The optical interface uses a conventional LC duplex connector. ?100G SR Bidi QSFP+?Duplex LC optical connector Hot Pluggable, dual wavelength VCSEL bi-directional optical interface, PAM4 2 × 50-Gb/s 850nm/900 nm, capable of over 70m transmission on OM3 multimode fiber (MMF)and 100m on OM4 MMF Multimode Fiber, 3.5W Power Consumption, Temp. range 0°C to 70°C, QSFP MSA and RoHS Compliant. DDM with I2C management interface and Host FEC. ?Wide Compatibility?It's fully compliant and compatible for Extreme Networks QSFP28 MSA and IEEE 802.3bm 100GBASE-SR Bi-Directional and CAUI-42 standards.