TP-Link TL-SM321B-2 1000Base-BX WDM SFP Module
TP-Link TL-SM321B-2 1000Base-BX WDM SFP Module
SKU:NWTL-SM321B-2
The TP-Link TL-SM321B-2 is a 1000Base-BX WDM SFP module designed for reliable single-fibre bidirectional communication. Featuring Digital Diagnostic Monitoring, hot-swappable design, and support for up to 2 km transmission distances, it delivers cost-effective fibre connectivity for IT infrastructure.
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- 36 months Manufacturer Warranty
Product Information
| Brand | TP-LINK |
|---|---|
| Category | Network - Consumer |
| SKU | NWTL-SM321B-2 |
| Availability | In Stock |
Overview
- The TP-Link TL-SM321B-2 is a standards-compliant 1000Base-BX WDM SFP transceiver module that enables bidirectional gigabit communication over a single strand of single-mode fibre. By using wavelength division multiplexing (WDM) with separate 1310nm transmit and 1550nm receive channels, it eliminates the need for dual-fibre installations, reducing cabling costs while maintaining full 1.25 Gbps throughput.
Designed for compatibility with standard SFP port equipment, the TL-SM321B-2 integrates seamlessly into existing network infrastructure. Its support for Digital Diagnostic Monitoring allows IT teams to monitor real-time performance metrics including optical power levels and module temperature, enabling proactive network management and faster troubleshooting.
With a maximum transmission range of 2 km on 9/125 μm single-mode fibre and a robust operating temperature range of 0–70 °C, this module delivers reliable performance for campus networks, remote office connectivity, and data centre interconnections. The hot-swappable design enables field replacement without system downtime, minimising operational disruption.
Specifications
| Standard | IEEE 802.3z (1000Base-BX) |
|---|---|
| Data Rate | 1.25 Gbps |
| Transmission Protocol | TCP/IP |
| Wavelength (Transmit) | 1310 nm |
| Wavelength (Receive) | 1550 nm |
| WDM Type | Bidirectional single-fibre |
| Maximum Transmission Distance | 2 km (on 9/125 μm SMF) |
| Maximum Cable Length | 10 km |
| Fibre Type | Single-Mode Fibre (SMF), 9/125 μm |
| Connector Type | LC Simplex |
| Power Supply | 3.3V |
| Digital Diagnostic Monitoring | Yes |
| SFP-MSA Compliance | Yes |
| Hot-Swappable | 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 Certifications | FCC, CE |
| Warranty | 36 months |
Key Features
Ideal For
FAQs
What is WDM and how does it work in the TL-SM321B-2?
Wavelength Division Multiplexing (WDM) allows the module to transmit and receive simultaneously over a single fibre strand using different wavelengths. The module transmits at 1310nm and receives at 1550nm, enabling bidirectional communication without requiring a second fibre or additional cabling infrastructure.
What is the maximum transmission distance for the TL-SM321B-2?
The maximum transmission distance is 2 km on 9/125 μm single-mode fibre. For longer distances, extended-range modules with higher power budgets may be required.
Is the TL-SM321B-2 compatible with my existing network equipment?
Yes, the module is fully compliant with the SFP-MSA (Multi-Source Agreement) standard, making it compatible with any network equipment featuring standard SFP ports. Always verify your device's specifications before purchasing.
What is Digital Diagnostic Monitoring (DDM) and why is it useful?
DDM allows real-time monitoring of module performance, including optical power levels, laser temperature, and operational status. This enables proactive identification of issues, faster troubleshooting, and better network reliability without requiring specialised test equipment.
Can the TL-SM321B-2 be installed without powering down the network?
Yes, the module is hot-swappable, allowing you to install or replace it while the device remains powered on. However, the network link on that port will temporarily drop during the swap.
What fibre type is required for the TL-SM321B-2?
The module requires single-mode fibre (SMF) with a 9/125 μm core diameter. Single-mode fibre is essential for long-distance, high-speed transmission and is not interchangeable with multi-mode fibre.
What is included in the 36-month warranty?
The module is covered by a 36-month manufacturer's warranty against defects in materials and workmanship. Contact Hyetech Australia for full warranty terms and support details.
