TP-Link TL-SM321B-2 1000Base-BX WDM Bi-Directional SFP Module

Streamline your business fiber network with the high-efficiency TP-Link TL-SM321B-2 1000Base-BX WDM Bi-Directional SFP Module. Formulated in compliance with the rigid Small Form Pluggable Multi-Source Agreement (SFP-MSA), this industrial-grade optical transceiver uses advanced Wave Division Multiplexing (WDM) to transmit and receive data concurrently over just a single single-mode fiber strand up to 2 km. It is the ultimate mini-GBIC component for expanding network ranges safely across switches, core routers, and cloud server frames without doubling cable layout costs.

Key Features & Benefits

• Advanced WDM Bi-Directional Technology: Transmits data at 1310 nm and receives at 1550 nm over a single fiber strand, cutting down infrastructure physical installation overhead by up to 50%.
• Extended Range Gigabit Throughput: Achieves highly responsive 1.25 Gbps full-duplex data paths across 9/125 μm Single-Mode Fiber (SMF) spanning up to 2 km (1.24 miles).
• Digital Diagnostic Monitoring (DDM): Complies with SFF-8472 to provide network admins real-time health metrics including interior temperature, voltage performance, laser power, and transceiver loop currents.
• Hot-Swappable Module Convenience: Designed to minimize corporate downtime by allowing operators to plug or pull out modules effortlessly without resetting switch chassis systems.
• Perfect Integration Match: Specifically engineered to work in tandem as a matched terminal pair alongside the TP-Link TL-SM321A-2 module on the opposing node endpoint.

Technical Specifications

Specification Class	Technical Data Details
Standards & Protocols	IEEE 802.3z, TCP/IP, SFP-MSA, SFF-8472
Max Data Link Rate	1.25 Gbps (Full Duplex Mode)
Operating Wavelength	TX (Transmit): 1310 nm | RX (Receive): 1550 nm
Interface Port Type	1 × LC Simplex Connector Type
Cable Medium	9/125 μm Single-Mode Fiber (SMF)
Max Transmission Distance	2 KM (1.24 Miles)
Power Voltage	3.3V Low-Voltage Line Drive
Special Hardware Support	Digital Diagnostic Monitoring (DDM), Hot Swappable Structure
Safety Emissions	FCC, CE, RoHS Compliant
Dimensions (W x D x H)	55.4 × 14.6 × 12.9 mm (2.2 × 0.6 × 0.5 in)