The Essential Link for Single-Strand Gigabit Fiber. The SM321B is a high-performance WDM Bi-Directional SFP module designed to work in tandem with the SM321A. By utilizing complementary wavelengths, it allows for full-duplex gigabit data transmission over a single strand of single-mode fiber, effectively maximizing your existing cable infrastructure.

Key Features:

• Bi-Directional WDM Technology: Transmits data at 1310 nm and receives at 1550 nm, perfectly matching the SM321A's frequencies.

• 20km Transmission Distance: Reliable long-range connectivity for enterprise campuses, remote offices, and industrial sites.

• Cost-Efficient Infrastructure: Uses only one fiber strand instead of two, reducing cabling requirements and costs by 50%.

• Hot-Swappable Design: Seamlessly plug or unplug the module from any compatible SFP port without interrupting the rest of the network.

• Single-Mode Fiber Optimized: Precision-engineered for 9/125µm SMF to ensure low signal attenuation over long distances.

• Standardized Compatibility: Fully compliant with IEEE 802.3z and SFP Multi-Source Agreement (MSA) for broad hardware support.

What’s in the Box:

• SM321B SFP Module

• Installation Guide