TP-Link TL-SM321A-2 1000Base-BX SFP Module
TP-Link TL-SM321A-2 1000Base-BX SFP Module
SKU:NWTL-SM321A-2
The TP-Link TL-SM321A-2 is a 1000Base-BX WDM bi-directional SFP module designed for cost-effective fibre optic connectivity. Featuring hot-swap capability, digital diagnostic monitoring, and support for up to 2 km transmission distances, it delivers reliable single-mode fibre connectivity for network infrastructure upgrades.
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Product Information
| Brand | TP-LINK |
|---|---|
| Category | Network - Consumer |
| SKU | NWTL-SM321A-2 |
| Availability | In Stock |
Overview
- The TP-Link TL-SM321A-2 is a 1000Base-BX WDM SFP module that delivers 1 Gbps bi-directional fibre optic connectivity for modern network infrastructure. Using wavelength division multiplexing, it transmits and receives on separate wavelengths (1550 nm and 1310 nm respectively), allowing full-duplex communication over a single strand of single-mode fibre up to 2 km.
Designed for IT professionals and network managers, this module combines affordability with enterprise-grade reliability. Its hot-swappable design enables installation and replacement without powering down systems, while built-in Digital Diagnostic Monitoring provides real-time visibility into module health and performance.
Fully compliant with SFP-MSA standards, the TL-SM321A-2 integrates seamlessly with existing network equipment featuring standard SFP ports. The LC simplex connector and robust construction ensure dependable operation in demanding environments, backed by a three-year warranty.
Specifications
| Standard | IEEE 802.3z, 1000Base-BX |
|---|---|
| Data Rate | 1.25 Gbps |
| Wavelength TX | 1550 nm |
| Wavelength RX | 1310 nm |
| Transmission Mode | WDM bi-directional |
| Fibre Type | 9/125 μm single-mode fibre |
| Maximum Cable Length | 2 km |
| Connector Type | LC simplex |
| Power Supply | 3.3 V |
| Hot Swappable | Yes |
| Digital Diagnostic Monitoring | Yes |
| SFP-MSA Compliance | Yes |
| Operating Temperature | 0–70 °C |
| Storage Temperature | -40–85 °C |
| Operating Humidity | 10–90% RH (non-condensing) |
| Storage Humidity | 5–90% RH (non-condensing) |
| Safety & Emission Certifications | FCC, CE |
| Warranty | 36 months |
Key Features
Ideal For
FAQs
What is the difference between 1000Base-BX and 1000Base-SX?
1000Base-BX uses single-mode fibre and supports distances up to 2 km, making it ideal for longer-distance links. 1000Base-SX uses multi-mode fibre and is limited to shorter distances (around 550 m). The TL-SM321A-2 is designed for single-mode fibre applications requiring greater transmission range.
Can I use this module with any SFP-compatible switch or router?
Yes. The TL-SM321A-2 is SFP-MSA compliant, meaning it works with any standard SFP port on compatible networking equipment from various manufacturers. Verify your device supports 1000Base-BX before purchase.
What does Digital Diagnostic Monitoring (DDM) do?
DDM allows real-time monitoring of module performance parameters including temperature, optical power levels, and signal integrity. This enables proactive network management and faster troubleshooting of connectivity issues.
How far can this module transmit?
The TL-SM321A-2 supports transmission distances up to 2 km over 9/125 μm single-mode fibre. Actual distance may vary depending on fibre quality and environmental conditions.
Is the module hot-swappable?
Yes. The hot-swappable design allows you to insert or remove the module while the system is powered on, eliminating the need for system downtime during installation or replacement.
What connector type does this module use?
The TL-SM321A-2 uses an LC simplex connector, a standard connector type widely used in fibre optic networks for single-mode applications.
What is WDM and why is it important?
Wavelength Division Multiplexing (WDM) uses different light wavelengths to transmit and receive data simultaneously over a single fibre strand. This enables full-duplex bi-directional communication, reducing fibre costs compared to traditional single-direction modules.
