QSFP28 Optical Transceiver Module Extralink 100Gb/s 2km Single‑mode Duplex LC

Extralink QSFP28 Optical Transceiver Module provides 100 Gb/s optical connectivity over single‑mode fiber for duplex LC links up to 2 km. Designed for use in switches, routers and optical transport equipment, the module implements a four‑lane QSFP28 interface that supports 100 Gigabit Ethernet links and data center interconnects. The small form‑factor QSFP28 transceiver is intended for installations where high throughput, compact footprint and single‑mode reach are required.

Advantages

The module delivers high‑speed transmission up to 100 Gb/s while maintaining compatibility with standard 100 Gigabit Ethernet equipment. Its single‑mode design and duplex LC connector allow reliable links up to 2 km without intermediate amplification, supporting longer interconnect runs between racks, rooms or buildings. The QSFP28 form factor offers a compact, hot‑pluggable solution that simplifies upgrades from lower‑rate transceivers and enables increased port density in data centers and carrier networks.

Suitable for

• 100 Gigabit Ethernet uplinks and backbone connections in data centers and enterprise networks
• Short to medium distance single‑mode fiber links up to 2 km between switches, routers or optical transport equipment
• High‑density deployments requiring QSFP28 four‑lane transceivers
• Upgrading existing infrastructure from lower‑speed transceivers to 100 Gb/s capacity

When it may not be suitable

This transceiver is designed specifically for single‑mode fiber and duplex LC connectors; it is not suitable for multimode fiber links or networks requiring different connector types without adapters. It also targets links up to 2 km — for longer spans, optical amplifiers or transceivers with greater reach are required. Compatibility with specific network equipment should be verified, as some devices require vendor‑approved or coded modules.

Key specifications

• Data rate: 100 Gb/s (QSFP28, four lanes)
• Fiber type: single‑mode fiber
• Maximum reach: up to 2 km over single‑mode fiber
• Connector: duplex LC
• Form factor: QSFP28, hot‑pluggable
• Application: 100 Gigabit Ethernet and optical transport

How to use

Insert the QSFP28 transceiver into a compatible QSFP28 port on a switch, router or optical transponder while the device is powered on or following the vendor’s hot‑plug guidance. Connect duplex LC‑terminated single‑mode fiber patch cords to the transceiver’s LC ports, ensuring correct transmit/receive orientation. Configure the host interface as required for 100 Gigabit Ethernet operation and verify link status and diagnostics through the network device management interface. Follow standard ESD precautions when handling the module and keep optical interfaces covered until connections are made.

What to consider before purchase

• Ensure device compatibility with QSFP28 transceivers and whether the equipment accepts third‑party modules
• Verify that single‑mode fiber and duplex LC connectors are used in your link
• Confirm required reach does not exceed 2 km for the intended link
• Check network configuration and management support for 100 Gb/s links

Usage recommendations

Use factory‑terminated single‑mode LC patch cords of appropriate attenuation and maintain clean connector end faces for reliable links. Test link performance after installation and monitor SFP diagnostics where supported to detect signal degradation. When upgrading capacity, plan for port density, power and cooling in the equipment rack to accommodate additional 100 Gb/s modules.