This 40G QSFP+ 1310nm 10km optical transceiver is engineered for robust 10-kilometer links in data center interconnects and metro networks. Fully compliant with the IEEE 802.3ba 40GBASE-LR4 standard, it supports aggregate bandwidth exceeding 40 Gbps.

The QSFP 40G LR4 transceiver employs a CWDM design, multiplexing four 10 Gbps electrical lanes into four optical signals at standardized wavelengths (1271nm, 1291nm, 1311nm, 1331nm per ITU-T G694.2) for transmission over a single duplex LC pair of single-mode fiber (SMF), which is essential for maintaining signal integrity over distance. On the receiver side, the integrated demultiplexer separates the combined signal back into four independent electrical outputs.

Built to the QSFP Multi-Source Agreement (MSA) specification, its design ensures reliable operation under demanding conditions, including temperature variations and EMI. The device operates on a single +3.3V power supply and features comprehensive management via a 2-wire serial interface. This interface provides access to digital diagnostic monitoring (DDM) and control signals like Reset and Low Power Mode, allowing individual channels to be managed for optimized system flexibility and power efficiency.

FAQ

Q: What is the most common mistake made during the installation of this type of transceiver?

A: The most common issue is neglecting fiber connector cleanliness. A single speck of dust on an LC connector can cause enough signal loss to disrupt a 10km link. Always use professional fiber optic cleaning tools (like clicker pens or lint-free wipes) on the connector ends and the transceiver's optical port before mating them. This simple step prevents the majority of post-installation link failures.

Q: Can this QSFP 40G LR4 transceiver be used in an environment with significant temperature fluctuations, like an outdoor cabinet?

A: The standard version operates in a 0°C to 70°C range, suitable for controlled data centers. For uncontrolled environments like outdoor cabinets where temperatures may exceed this range, significant fluctuations can affect performance and longevity. For such deployments, please inquire about the availability of an industrial temperature grade version designed for wider temperature ranges.

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