The TP-Link TL-SM321A-2 is a high-performance 1000Base-BX WDM bi-directional SFP transceiver module designed for gigabit single-mode fiber networking. It supports transmission and reception on a single fiber strand using different wavelengths (TX: 1550 nm, RX: 1310 nm), enabling efficient fiber utilization. With a maximum transmission distance of up to 2 km over 9/125 μm single-mode fiber, it is ideal for short-range fiber link applications.

Featuring compatibility with the Small Form Pluggable Multi-Source Agreement (SFP-MSA), this module fits seamlessly into switches, routers, media converters, and other network devices supporting SFP ports. It supports a data rate of 1.25 Gbps and uses an LC simplex connector for optical interfaces.

The TL-SM321A-2 includes Digital Diagnostic Monitoring (DDM) compliant with SFF-8472, providing real-time monitoring of optical power, temperature, and supply voltage to ensure reliable operation. Its hot-swappable design allows easy insertion or removal without powering down equipment.

Operating on a 3.3 V power supply, it complies with FCC and CE safety and emission standards. The module is designed to operate in temperatures ranging from 0 to 70 °C and humidity from 10% to 90% RH (non-condensing), with storage conditions ranging from -40 to 85 °C and 5% to 90% humidity.

Compact in size, this module offers a robust solution for efficient and reliable fiber networking in business, campus, and service provider environments.