Network transceiver module BlueOptics QSFP+KT-LX4-BO QSFP 40 Gbit/s fiber optic

BlueOptics QSFP+KT-LX4-BO is a QSFP form-factor fiber optic transceiver module that supports data rates up to 40 Gbit/s. The module is designed for QSFP interfaces and enables 40 Gigabit Ethernet, Fibre Channel over Ethernet or SDH/SONET links in switches, routers and storage systems. It uses an LC duplex connector and is intended for single‑mode fiber deployments; the silver-coloured module is compatible with standard QSFP ports that accept 40GBASE‑LX4 devices.

Advantages

The transceiver follows MSA QSFP mechanical and electrical standards and is built from high‑quality optical and electronic components to ensure long service life and reliable performance. It supports Digital Diagnostics Monitoring (DDM/DOM) for real‑time monitoring of supply voltage, laser bias current, transmit power, receive power and temperature. The LC duplex interface allows simultaneous transmit and receive over a two‑fibre link and the module is tested for compatibility with relevant hardware platforms that support the original QSFP 40GBASE‑LX4 devices.

Suitable for

• 40 Gigabit Ethernet links in data centre switches and routers
• Fibre Channel over Ethernet or SAN interconnects at 40 Gbit/s
• High‑speed SONET/SDH links and telecom installations
• Single‑mode fiber runs up to the module's specified reach

When it may not be suitable

This single‑mode LX4 QSFP is not intended for multimode fiber installations that require MMF‑optimised optics; multimode deployments may require different transceivers. Also ensure the host hardware supports 40GBASE‑LX4 and the DDM/DOM functions if you require monitoring—otherwise diagnostic features may be unavailable.

Key specifications

• Form factor: QSFP
• Maximum data rate: 40 Gbit/s
• Connector: LC duplex
• Fiber type: single‑mode
• Supported protocols: 40 Gigabit Ethernet, Fibre Channel over Ethernet, SDH/SONET
• Module colour: silver
• Weight: 0.04 kg
• Digital Diagnostics Monitoring (DDM/DOM): supported (MSA SFF‑8472)

How to use

Insert the QSFP transceiver into a compatible QSFP slot on a switch, router or storage system that supports 40GBASE‑LX4. Connect an LC duplex single‑mode patch cable between transceivers or to a patch panel to establish the optical link. If monitoring is required, verify that the host hardware exposes DDM/DOM readouts to access supply voltage, laser bias, transmit/receive power and temperature values. Follow standard ESD handling and hot‑swap procedures recommended by the equipment vendor.

What to consider before purchase

• Confirm the host device supports 40GBASE‑LX4 QSFP modules and the QSFP+ interface
• Verify you require single‑mode optics and LC duplex connectors for your fiber run
• Check whether DDM/DOM support is needed and supported by your hardware
• Ensure cable type and length meet the link budget and required reach

Usage recommendations

For best results use high‑quality single‑mode LC duplex patch cords and, if possible, install the module into equipment that officially supports 40GBASE‑LX4. Regularly monitor DDM/DOM values to detect signal degradation early and follow manufacturer guidelines for ESD protection and module handling.