The QSFP28 LR4 is a hot-pluggable, four-channel, and full-duplex optical transceiver module designed for long-distance transmission up to 10 km in the 100G Ethernet network with a working bandwidth of 1295nm to 1310nm. Cisco ® QSFP28 100G ZR extends 100GbE coherent links from QSFP28 ports reaching up to 80km over dark fiber and up to 300km over amplified Dense Wave Division Multiplexing (DWDM) links. Below, you will find comprehensive module comparisons, realistic market pricing, and precise vendor compatibility protocols to ensure a. Now, we will introduce the QSFP28 100G LR4 optical transceiver module, covering its definition, working principle, specifications, applications, and FAQs. These transceivers are a popular choice for Data Center Interconnect (DCI). It is a new form factor defined in SFF Committee specifications SFF-8636 and. Support transport, data center, and metro networks with Precision OT's diverse line of 100G optical transceivers and 100G QSFP28 Direct Attach Cables and Active Optical Cables. This product line is representative of the wide range of 100G modules on the market, with a comprehensive product line. QSFP28 (Quad Small Form-Factor Pluggable 28) enables 100G transmission by aggregating four parallel 25G electrical lanes, delivering an optimal balance of bandwidth efficiency, power consumption, and deployment flexibility. Compared with legacy 40G QSFP+ modules, QSFP28 provides 2.