TP-Link TL-SM321A-2 | 1000Base-BX WDM Bi-Directional SFP Module – 2km LC Simplex | DDM | SFP-MSA Compliant

The TP-Link TL-SM321A-2 is a WDM Bi-Directional Gigabit SFP transceiver designed for cost-effective, single-strand fiber deployments. Operating over 9/125 μm single-mode fiber, it transmits data at 1550nm and receives at 1310nm, supporting full-duplex communication up to 2 km. This makes it ideal for short-to-medium distance links such as building-to-building connections or fiber-to-the-desk applications.

With full SFP-MSA compliance, Digital Diagnostic Monitoring (DDM), and hot-swappable functionality, the TL-SM321A-2 ensures simple deployment, performance monitoring, and maintenance. It is the perfect match to pair with TL-SM321B-2 for efficient WDM communication over a single optical fiber.

What’s in the Box

• TP-Link TL-SM321A-2 WDM SFP Module

• Installation Guide

Main Features

✅ WDM Bi-Directional Transmission – Transmit at 1550nm and receive at 1310nm
✅ Single-fiber design reduces cabling cost and fiber usage
✅ 2 km transmission range over 9/125 μm single-mode fiber
✅ 1.25 Gbps Gigabit Ethernet data rate
✅ LC Simplex connector for compact deployment
✅ Supports DDM for real-time diagnostics and power monitoring
✅ SFP-MSA compliant for broad switch and router compatibility
✅ Hot-swappable for seamless network maintenance

Detailed Specifications

Data Rate

• 1.25 Gbps

Wavelength

• TX: 1550 nm

• RX: 1310 nm

Connector Type

• LC Simplex

Fiber Type

• 9/125 μm Single-Mode Fiber

Maximum Distance

• 2 km

Form Factor

• SFP

Hot Swappable

• Yes

Digital Diagnostic Monitoring (DDM)

• Supported

Standards & Protocols

• IEEE 802.3z

• TCP/IP

• SFP-MSA compliant

Power Supply

• 3.3 V

Certifications

• FCC, CE

Dimensions (W x D x H)

• 2.2 × 0.6 × 0.5 in (55.4 × 14.6 × 12.9 mm)

Environmental Conditions

• Operating Temperature: 0°C to 70°C (32°F to 158°F)

• Storage Temperature: -40°C to 85°C (-40°F to 185°F)

• Operating Humidity: 10%–90% RH, non-condensing

• Storage Humidity: 5%–90% RH, non-condensing

Warranty Information

Manufactures warrenty applied .

Brand Description

TP-Link Omada is recognized for delivering reliable, high-performance networking hardware tailored for business and enterprise environments. The TL-SM321A-2 exemplifies this commitment with cost-effective WDM fiber connectivity, high reliability, and industry-standard compatibility.

SKU

TL-SM321A-2

Practical Use Scenarios

🏢 Short-Distance Fiber Uplinks – Ideal for point-to-point fiber runs up to 2 km in business campuses
🏫 Education and Government Sites – Perfect for connecting buildings using minimal fiber cabling
🔌 Pair with TL-SM321B-2 – Deploy a full-duplex link over a single optical fiber
📶 IP Surveillance & Access Control – Use in networks requiring reliable fiber backhaul

Datasheets / Downloadable Resources

📄 Datasheet TL-SM321A-2

Excellence for the Australian and New Zealand Market

The TL-SM321A-2 is specifically optimized for the ANZ region, complying with FCC and CE certifications. All units sold in Australia and New Zealand are sourced exclusively through authorized TP-Link distributors, ensuring genuine product support, regional warranty service, and full alignment with local compliance and performance standards.

FAQs

Q1. What fiber cable is compatible with the TL-SM321A-2? (TL-SM321A-2)
The TL-SM321A-2 is compatible with 9/125 μm single-mode fiber and uses an LC simplex connector.

Q2. Can the TL-SM321A-2 be used with TL-SM321B-2? (TL-SM321A-2)
Yes, TL-SM321A-2 is designed to be paired with TL-SM321B-2 for single-strand bi-directional transmission over 2 km.

Q3. Is the TL-SM321A-2 compatible with third-party switches? (TL-SM321A-2)
Yes, as it is SFP-MSA compliant, it supports a wide range of industry-standard SFP ports beyond TP-Link devices.

Q4. Does the TL-SM321A-2 support digital diagnostics? (TL-SM321A-2)
Yes, it features Digital Diagnostic Monitoring (DDM) for real-time performance insights.

Q5. What is the transmission distance of the TL-SM321A-2? (TL-SM321A-2)
The maximum supported transmission distance is 2 km over single-mode fiber.