TP-Link’s SM321B utilizes the latest 1000Base-BX standard, enabling data transmission over a single-mode fiber using different wavelengths for upstream and downstream. When paired with the SM321A, it can extend network coverage up to 20 km—ideal for reliable, high-speed, long-distance communication using TP-Link routers, switches, and media converters.
Core Features:
- Up to 20 km transmission distance with 9/125 μm SMF (Single-Mode Fiber)
- Bidirectional WDM communication on a single fiber
- Compatible with Small Form Pluggable Multi-Source Agreement (SFP-MSA)
- Supports Digital Diagnostic Monitoring (DDM)
- Hot-swappable module design
- Work with TL-SM321A as a pair
