The TP-Link TL-SM321A-2 is a high-performance WDM bi-directional Small Form Pluggable (SFP) optical transceiver designed for gigabit fiber networking. Compliant with the SFP-MSA standard and IEEE 802.3z, this module offers reliable full-duplex data transmission at speeds up to 1.25 Gbps (Gigabit Ethernet) over a single strand of 9/125 µm single-mode fiber. It achieves this by utilizing distinct transmit and receive wavelengths (TX at 1550 nm and RX at 1310 nm), enabling efficient bidirectional communication over distances of up to 2 kilometers.

Equipped with Digital Diagnostic Monitoring (DDM) compliant with SFF-8472, the TL-SM321A-2 allows real-time monitoring of key operating parameters such as optical power, temperature, and voltage, ensuring stable network performance. Its hot-swappable design enables seamless insertion and removal without impacting connected devices, promoting easy maintenance and upgrades.

Powered by a standard 3.3 V supply and featuring an LC simplex connector, this SFP module is ideal for connecting switches, routers, servers, and media converters in short- to medium-range fiber optic networks. Additionally, it holds FCC and CE certifications for safety and emission standards. Whether deploying new network infrastructure or expanding existing setups, the TP-Link TL-SM321A-2 delivers reliable, efficient, and easy-to-deploy fiber connectivity.