TP-Link ISM321A-20 1000Base-BX Industrial SFP Module
TP-Link ISM321A-20 1000Base-BX Industrial SFP Module
SKU:NWTL-ISM321A-20
The TP-Link ISM321A-20 is a 1000Base-BX industrial SFP module designed for cost-effective single-fibre networking. Featuring WDM bi-directional technology, hot-pluggable design, and digital diagnostic monitoring, it delivers reliable long-distance connectivity for demanding industrial environments.
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Product Information
| Brand | TP-LINK |
|---|---|
| Category | Network - Consumer |
| SKU | NWTL-ISM321A-20 |
| Availability | In Stock |
Overview
- The TP-Link ISM321A-20 is a 1000Base-BX WDM industrial SFP module built for demanding network environments. By combining transmit and receive functions on a single strand of single-mode fibre, it reduces infrastructure costs while maintaining Gigabit performance. Its -40 to 85°C operating range makes it suitable for outdoor, industrial, and temperature-extreme locations where standard commercial modules would fail.
The module integrates Digital Diagnostic Monitoring to provide real-time insights into transceiver health and signal quality, enabling proactive network management. Hot-pluggable design allows technicians to swap or upgrade modules without powering down equipment, minimising downtime during maintenance. Full SFP-MSA compatibility ensures it works with a wide range of network switches and routers from major vendors.
Ideal for industrial automation, remote site connectivity, manufacturing plants, and utility networks where reliability and cost efficiency are priorities.
Specifications
| Brand | TP-Link |
|---|---|
| Model | ISM321A-20 |
| Product Type | Industrial SFP Module |
| Transmission Standard | 1000Base-BX |
| Fibre Type | Single-mode |
| Connector Type | LC |
| Technology | WDM (Wavelength Division Multiplexing) bi-directional |
| Data Rate | 1 Gbps |
| Diagnostic Monitoring | Digital Diagnostic Monitoring (DDM) |
| Operating Temperature Range | -40 to 85°C |
| Form Factor | SFP |
| Standards Compliance | SFP-MSA (Small Form Pluggable Multi-Source Agreement) |
| Hot-Pluggable | Yes |
| Warranty | 36 months |
Key Features
Ideal For
FAQs
What is WDM bi-directional technology and how does it save costs?
WDM (Wavelength Division Multiplexing) allows the ISM321A-20 to transmit and receive data simultaneously over a single strand of fibre using different wavelengths. This eliminates the need for dual-fibre installation, reducing cable and conduit expenses by approximately 50% compared to standard duplex connections.
Is the TP-Link ISM321A-20 compatible with my existing network equipment?
Yes. The module is SFP-MSA compliant, meaning it works with any standard SFP-compatible switch, router, or NIC from major vendors including Cisco, Juniper, Dell, and others. Check your equipment's SFP slot specifications to confirm compatibility.
What does Digital Diagnostic Monitoring (DDM) provide?
DDM enables real-time monitoring of transceiver performance metrics such as optical power levels, temperature, and signal integrity. This allows network administrators to detect potential issues early, troubleshoot problems faster, and make data-driven capacity planning decisions.
Can the ISM321A-20 be used in outdoor or extreme temperature environments?
Yes. With an operating temperature range of -40 to 85°C, the module is designed for industrial and outdoor installations where commercial-grade SFP modules typically fail, including utility networks, remote sites, and manufacturing plants.
What is the maximum transmission distance with the ISM321A-20?
As a 1000Base-BX single-mode module, the ISM321A-20 supports long-distance links. Exact distance depends on fibre quality and loss characteristics, but single-mode 1000Base-BX typically operates reliably up to 10 km or more. Consult TP-Link datasheets or your vendor for specific distance specifications for your installation.
Is the module hot-pluggable, and can I replace it without downtime?
Yes. The ISM321A-20 is fully hot-pluggable, allowing you to insert or remove the module from a powered SFP slot without interrupting network traffic or requiring equipment restart.
What warranty does the TP-Link ISM321A-20 include?
The module comes with a 36-month (3-year) warranty covering defects in materials and workmanship, providing peace of mind for long-term industrial deployments.
