QSFP Transceiver BlueOptics QSFP-40G-iSM4 (40GBASE-PLR4L, MPO/MTP, Singlemode 1310nm, 2 km, 0–70°C)

The BlueOptics QSFP-40G-iSM4 is a QSFP transceiver module compatible with Huawei equipment, designed for 40GBASE-PLR4L links over singlemode fiber. It uses an MPO/MTP interface, transmits at a wavelength of 1310 nm and supports link distances up to 2 km. The module is intended for data center uplinks, carrier-grade aggregation and other high-bandwidth interconnects operating in standard ambient temperatures from 0 to 70°C.

Advantages

The transceiver provides 40 Gbps aggregated throughput in a compact QSFP form factor and supports long-reach singlemode connections up to 2 km. Its MPO/MTP interface simplifies parallel-fiber connections and multi-fiber infrastructure migration. Designed to be compatible with common networking equipment, the module enables high-density port deployments and efficient use of fiber plant while maintaining industry-standard optical parameters for reliable link performance.

Suitable for

• Data center 40 Gbps uplinks between switches and aggregation devices
• Carrier and metro aggregation where singlemode long-reach links are required
• High-density optical patch panels and MPO/MTP trunk cabling
• Fiber upgrades from 10G to 40G using parallel singlemode infrastructure

When it may not be suitable

This transceiver is optimized for singlemode fiber with MPO/MTP connections and 40GBASE-PLR4L signaling; it is not suitable for multimode fiber networks or for direct-attach copper connections. It also requires network equipment that accepts QSFP modules and supports 40GBASE-PLR4L; it will not function in devices limited to other form factors or incompatible optical specifications.

Key specifications

• Form factor: QSFP (Quad Small Form-factor Pluggable)
• Data rate: 40 Gbps (aggregate)
• Optical standard: 40GBASE-PLR4L
• Fiber type: Singlemode fiber
• Connector: MPO/MTP
• Wavelength: 1310 nm
• Maximum reach: up to 2 km over singlemode fiber
• Operating temperature: 0 to 70 °C

How to use

Install the QSFP transceiver into a compatible QSFP port on your switch or optical line system following the equipment manufacturer’s hot‑swap and electrostatic discharge precautions. Connect an MPO/MTP trunk or cassette terminated with singlemode fibers to the module, ensuring correct fiber polarity and clean connector endfaces. Verify link status and negotiated speed through the host device management interface and perform optical power and end-to-end testing as part of commissioning.

What to consider before purchase

• Confirm host device compatibility with QSFP form factor and 40GBASE-PLR4L optical specifications
• Ensure your fiber infrastructure uses singlemode fiber and MPO/MTP terminations suitable for parallel optics
• Check required operating temperature range and environmental conditions
• Plan for fiber polarity, connector cleanliness and testing equipment for proper commissioning

Usage recommendations

Use clean MPO/MTP connectors and follow standard inspection procedures before insertion. For reliable long-reach links, validate end-to-end loss and power budget to confirm performance over the planned 2 km span. When integrating into mixed vendor environments, verify link compatibility from the host device and consider ordering a small quantity first for interoperability testing.