The Cisco QSFP-100G-ZR4-S is a 100 Gbps transceiver module manufactured by Cisco. It uses the QSFP form factor and supports duplex LC connectors over single-mode fiber (SMF) with transmission wavelengths of 1295 nm, 1300 nm, 1304 nm, and 1309 nm.

This transceiver offers up to an 80 km optical reach using DWDM technology across four channels on SMF. Designed for long-distance data center interconnects or metropolitan transport links requiring extended range without signal regeneration. Compatible with standard MSA-compliant ports supporting hot-swappable QSFP modules in switch or router platforms that meet physical interface requirements. Powered through host system backplane; no external power supply required.

Cisco QSFP-100G-ZR4-S: 100GBASE QSFP Transceiver, 80KM reach over SMF, Duplex LC