TP-Link TL-SM321A-2 1000Base-BX WDM Bi-Directional SFP Module High-Performance Gigabit Fiber Link

Extend your commercial networking range cleanly and cost-effectively with the TP-Link TL-SM321A-2 1000Base-BX WDM Bi-Directional SFP Module . Designed for switches, routers, and enterprise servers, this high-performance MiniGBIC transceiver enables ultra-fast gigabit optical transmissions over a single strand of single-mode fiber .

By leveraging advanced Wavelength Division Multiplexing (WDM), the TL-SM321A-2 transmits data at 1550 nm and receives at 1310 nm over one single fiber strand . This cuts physical cabling deployment costs in half by removing the need for traditional dual-strand fiber configurations .

Key Features & Performance Benefits

• 2 km Transmission Distance: Transmits reliable Gigabit data speeds over 9/125 m Single-Mode Fiber (SMF) at ranges up to 2 kilometers .
• SFP-MSA Standard Compliance: Engineered to match the global Small Form Pluggable Multi-Source Agreement, ensuring broad physical compatibility with standard SFP slots .
• Digital Diagnostic Monitoring (DDM): Features SFF-8472 compliant real-time monitoring, allowing IT managers to view critical metrics like laser temperature, transceiver current, and Tx/Rx optical power .
• Hot-Swappable Design: Offers seamless physical installation and hot-swappable module swaps without needing to power down network switches, keeping your system online .
• LC Simplex Connection: Features a secure, integrated LC Simplex connector port designed for high-density patch panel networks .

Technical Specifications

Parameter	Specifications
Brand	TP-Link
Model	TL-SM321A-2
Standards & Protocols	IEEE 802.3z, TCP/IP
Wavelength	TX: 1550 nm / RX: 1310 nm
Power Supply	3.3 V
Safety & Emissions	FCC, CE
Fiber Type	9/125 m Single-Mode Fiber (SMF)
Max. Cable Length	2 km (1.2 Miles)
Data Rate	1.25 Gbps (Gigabit Speed)
Port Type	LC Simplex
DDM Support	Yes (SFF-8472 Compatible)
SFP-MSA Standard	Yes
Hot Swappable	Yes
Dimensions (W x D x H)	55.4 14.6 12.9 mm (2.2 0.6 0.5 in)
Operating Temperature	0C to 70C (32F to 158F)
Warranty	1 Year