40G QSFP+ ER4 40km

Q: What are the pros and cons of QSFP+ DAC high-speed cables?

A: QSFP+ DAC high-speed cables boast advantages of low cost, low power consumption, strong interchangeability, and plug-and-play capability. However, they are heavy, bulky, less convenient for transportation, and have limited transmission distance, which also makes them relatively difficult to manage. QSFP+ AOC high-speed cables, on the other hand, are lighter, offer greater bandwidth, and feature electromagnetic interference resistance, ensuring higher security and transmission performance.

Q: How to choose the right QSFP+ DAC high-speed cable and QSFP+ AOC high-speed cable?

A: When the transmission distance is less than 15 meters, QSFP+ DAC high-speed cables are the most cost-effective solution. For distances ranging from 15 meters to 100 meters, it’s advisable to use a 40G QSFP+ AOC high-speed cable. Beyond 100 meters, you can employ a 40G SR4 optical module paired with OM3 or OM4 multimode fiber patch cords, or a 40GBASE LR4 optical module with single-mode fiber patch cords to achieve longer transmission distances.

Q: What are the typical solutions for a 40G network?

A: At the heart of a 40G network layer, a common setup involves connecting a pair of optical modules (most commonly 40G QSFP+ modules) at each end of multimode fibers like OM3 or OM4, predominantly used for long-distance transmission. High-speed cables and active optical cables often serve as cost-saving alternatives to these optical modules and fibers in short-range interconnect applications.

Q: Compatibility of 40G QSFP+ optical modules

A: They exhibit good compatibility, adhering to MSA (Multi-Source Agreement), ensuring interoperability among different vendors, though it’s essential to check the compatibility list for confirmation.

Q: Enclosure size of 40G QSFP+ optical modules

A: The enclosure dimensions are approximately 7×2.35×0.35×0.85 inches (length x width x height), featuring a compact design suitable for high-density card slots.

Q: Bit error rate of 40G QSFP+ optical modules

A: The bit error rate is extremely low, typically <10^-12, ensuring data transmission accuracy and network reliability.