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

TP-LINK´s TL-SM321B-2 is designed to work in a pair to create an on-site gigabit fiber communication up to 2km (2,000 meters). With one single-mode fiber, the pair of modules can create a full-duplex gigabit path between your switches, storage devices, and server. The TP-LINK´s TL-SM321B-2 is developed in accordance with the Small Form Pluggable Multi-Source Agreement (SFP-MSA). As a WDM Bi-Directional optical transceiver, TL-SM321B-2 uses an integrated LC Bi-Directional optical interface connector and the data link is up to 2 km in 9/125 ?m SMF (Single-Mode Fiber).
Also, TL-SM321B-2 incorporates the Digital Diagnostic Monitoring (DDM) feature which is compatible with SFF-8472. DDM supports real-time monitoring of the transceiver, and shows parameters including the transceiver current which transmits/receives optical power and operating temperature. TP-Link's TL-SM321B-2 is used for short-and medium distance fiber network in practice, and it provides fast and stable gigabit fiber connection for switches, routers, servers, etc.
Features
- Designed for on-site gigabit fiber communication: Enables efficient data transfer across networks for optimal performance.
- Up to 2 km transmission distance with 9/125 ?m SMF (Single-Mode Fiber): Allows extended reach while maintaining signal integrity.
- Bidirectional WDM communication on a single fiber: Reduces cabling requirements and simplifies setup without sacrificing performance.
- Compatible with Small Form Pluggable Multi-Source Agreement (SFP-MSA): Offers flexibility and interoperability with a wide range of devices.
- Supports Digital Diagnostic Monitoring (DDM): Provides real-time monitoring for proactive maintenance and troubleshooting.
- Hot-swappable module design: Facilitates easy replacement or upgrades without system downtime.
- Work with TL-SM321A-2 as a pair: Ensures a complete solution for your networking needs.
TP-Link TL-SM321B-2 Detailed Specifications
Product Type | SFP Bi-Directional Module |
Compatibility | SFP-MSA Compliant |
Transmission Medium | Single-Mode Fiber |
Distance | Up to 2 km |
Interface | LC Connector |
Data Rate | 1 Gbps |
Wavelength | 1310/1550 nm |
Diagnostic Monitoring | Supported (DDM/SFF-8472) |
Operating Temperature | 0°C to 70°C |