Description Cisco QSFP-100G-LR-S Compatible is a 100GBASE-LR QSFP28 transceiver that uses 1310nm PAM4 modulation to achieve a 10km reach over single-mode fiber. It features a duplex LC interface and full DOM support, offering a modern single-lambda approach to 100G connectivity in Cisco hardware. This transceiver is ideal for high-density single-mode environments requiring reliable performance and high signal integrity.