Optical transceiver Cisco QSFP-100G-DR-S 100GBASE-DR QSFP28 100Gbps 500m single-mode duplex LC

The Cisco QSFP-100G-DR-S is a QSFP28 optical transceiver engineered for 100GBASE-DR Ethernet links over single-mode fiber. This module provides 100 Gbps throughput using a duplex LC interface and supports distances up to 500 meters on standard single-mode fiber. Designed for data center and campus interconnects, the transceiver is hot-pluggable and optimized for low power consumption and compact port density in switches and routers that accept QSFP28 form factors.

Advantages

The module offers high-bandwidth 100 Gbps connectivity in a compact QSFP28 form factor, enabling efficient uplinks and inter-rack connections. With support for duplex LC single-mode fiber and a 500 m reach, it simplifies short-range data center cabling while maintaining interoperability with standard 100GBASE-DR interfaces. Hot-pluggability reduces service disruption during replacement or upgrades, and the low power profile helps minimize thermal load in dense equipment racks.

Suitable for

• 100 Gbps uplinks between switches and aggregation devices in data centers
• Interconnects within campus network buildings over single-mode fiber
• High-density port deployments requiring compact QSFP28 transceivers
• Replacement or expansion of existing 100GBASE-DR links

Key specifications

• Data rate: 100 Gbps (QSFP28)
• Interface: Duplex LC optical connector
• Fiber type: Single-mode fiber (SMF)
• Maximum reach: Up to 500 meters on SMF
• Standard: 100GBASE-DR Ethernet compatible
• Form factor: QSFP28 hot-pluggable
• Power: Low-power design suitable for dense deployments

How to use

Install the transceiver into a compatible QSFP28 port on a switch, router or network device while the host is powered on, using the hot-pluggable insertion procedure recommended by the equipment vendor. Connect duplex LC single-mode fiber patch cords to the module ensuring correct transmit/receive orientation. Verify link status on the host device and confirm that the interface negotiates 100 Gbps operation and the expected Ethernet standard. Monitor module temperature and optical alarm or diagnostic counters through the host’s management interface as needed.

Recommendations

Use clean, APC/PC-polished duplex LC connectors and follow proper fiber handling procedures to avoid signal loss. Ensure the host hardware supports 100GBASE-DR and QSFP28 transceivers. For optimal reliability, operate within the manufacturer’s recommended temperature and power specifications and perform link validation after installation.