TP-Link TL-SM321B 1000Base-BX WDM Bi-Directional SFP Module

Keep surveillance and security networks online and responsive with the TP-Link TL-SM321B 1000Base-BX SFP module. Built for long-distance, mission-critical links, this single-mode WDM transceiver delivers reliable 1.25 Gbps performance over a single fiber for distances up to 20 km — ideal for connecting remote camera clusters, monitoring stations, and distributed security systems. The compact, hot-swappable SFP form factor enables fast, tool-free upgrades or replacements with minimal operational disruption, while the LC/UPC connector ensures broad compatibility with existing fiber equipment. Designed for B2B deployments, the TL-SM321B reduces cabling complexity and cost by enabling bi-directional communication on one fiber, simplifying network topology for multi-site surveillance and access-control systems. Backed by TP-Link quality and a 2-year limited warranty, this module provides the dependable connectivity required for continuous monitoring and real-time security applications. Add the TL-SM321B to your network to extend fiber links, consolidate infrastructure, and ensure your security and monitoring systems stay connected — order now to upgrade your fiber backbone.

• Reduce cabling and labor costs with WDM bi-directional data over a single single-mode fiber
• Maintain reliable 1.25 Gbps links for security, surveillance and monitoring across up to 20 km
• Hot-swappable SFP design lets IT teams upgrade or replace modules without network downtime
• LC/UPC compatibility for broad interoperability with existing fiber switches and transceivers
• Enterprise-grade reliability with a 2-year limited warranty for critical infrastructure deployments