Cisco 100GBASE-LR4 QSFP28 Transceiver Module

The Cisco 100GBASE-LR4 QSFP28 Transceiver Module (QSFP-100G-LR4-S) delivers 100 Gigabit Ethernet connectivity over standard single-mode fiber using four independent 25 Gbps lanes multiplexed via LAN WDM (LWDM) wavelengths centered at 1295.56 nm, 1300.05 nm, 1304.58 nm, and 1309.14 nm. The module conforms to the IEEE 802.3ba 100GBASE-LR4 standard and achieves a maximum reach of 10 km on OS2 single-mode fiber, making it well suited for inter-building, inter-rack, and campus-scale optical links where extended reach beyond short-range optics is required.

The QSFP28 form factor supports a line-rate throughput of 100 Gbps in a compact, hot-swappable package compatible with Cisco Nexus, Catalyst, and ASR platform line cards that expose QSFP28 ports. The module incorporates an LC duplex connector interface and operates within a case temperature range that accommodates standard data center environments. Cisco's digital optical monitoring (DOM) capability is supported, enabling real-time visibility into transmitted and received optical power, supply voltage, and module temperature directly through network management tooling.

Designed for enterprise and service provider networks, the QSFP-100G-LR4-S is manufactured to Cisco's quality and interoperability standards and carries support through Cisco's standard hardware support programs. Its deployment profile spans spine-to-spine interconnects, data center interconnect (DCI) at campus scale, and high-density aggregation layers where 100G single-mode reach is a requirement without transitioning to CFP or CFP2 form factors.

Ideal for

• Inter-building campus fiber links requiring 100G throughput across distances up to 10 km on existing OS2 single-mode fiber plant
• Data center spine-to-spine or spine-to-core interconnects where rack separation or building distance exceeds short-reach (SR4) optic capabilities
• High-density server aggregation uplinks on Cisco Nexus platforms connecting top-of-rack switches to aggregation or core layers over structured single-mode cabling
• Data center interconnect (DCI) between two co-located or campus-adjacent facilities requiring a native 100G LR interface without external transponders
• Network upgrades migrating aggregation or backbone links from 10G or 40G to 100G while reusing installed single-mode fiber infrastructure
• Enterprise WAN handoff demarcation points where 100GBASE-LR4 is specified as the interface standard between customer premises equipment and carrier edge devices

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.