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TP-Link TL-SM321A-2 SFP module angled view showing gold connector pins and metal housing
TP-Link TL-SM321A-2 SFP module angled view showing gold connector pins and metal housing
Top view of TP-Link TL-SM321A-2 SFP transceiver with yellow pull tab and compliance labels
TP-Link TL-SM321A-2 SFP module diagram showing compatibility with switches, NAS, and servers
TP-Link SFP module front port with LC/UPC simplex fiber connector and WDM wavelength labels
TP-Link SM321A-2 SFP module rear view showing gold contacts and metal housing for reliable network links
TP-Link SFP module diagram for campus and enterprise networks with data center and building connection layout
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Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module

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2 Years Warranty

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$19.99 exc. VAT Note: VAT will be charged for UK & EU Countries at checkout. For Zero VAT (for EU buyers), please provide a VAT number at checkout.

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Dispatch Time: Next Working Day Dispatch timelines are estimates and may vary due to unforeseen delays of 1-2 working days for small orders. Larger quantities may require additional processing time.

Product Code: OPTT-215

MPN #: SM321A-2

Product Condition: New

Network upgrades often stall because existing fibre runs can’t reach distant sites without costly new cabling. The Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module solves this by letting you send and receive data over a single strand of fibre, extending your gigabit link up to 10 km (6.2 miles) with simple plug-in installation.

Usages of a 1.25Gbps SFP module

Ideal for campus networks, data-centre interconnects and remote office extensions, this module lets you replace dual-fiber runs with one fibre pair, saving space and reducing maintenance while keeping speeds at 1.25 Gbps for smooth video, VoIP and cloud traffic.

Benefits of TP-LINK SFP module
  • Easy installation: hot-swappable design means you can upgrade without powering down the switch.
  • Long reach: supports distances up to 10 km, cutting the need for additional repeaters.
  • Bi-directional traffic: different wavelengths handle send and receive on the same fibre, simplifying cabling.
  • Real-time monitoring: Digital Diagnostics Monitoring provides live health data for proactive management.
  • Compatibility: works with TL-SM321A, MC112CS and other third-party WDM modules for flexible deployments.

TP-LINK SFP module

Choosing this TP-LINK solution gives you a reliable, future-proof link that outperforms basic single-mode transceivers. The built-in WDM technology means you get full gigabit performance while using only one fibre strand, reducing both material costs and installation time. Its compliance with MSA, FCC, EAC, C-Tick and RoHS ensures it meets global safety and environmental standards, giving you peace of mind in any setting.

The module’s 3.3 V power requirement and rugged metallic housing make it suitable for harsh environments, while the 1310 nm receive and 1550 nm transmit wavelengths guarantee clear, interference-free communication. With digital diagnostics, you can monitor temperature, voltage and optical power directly from your network management system, helping you avoid downtime before it happens.

Key Features of a 1.25Gbps SFP module
  • Form factor: Plug-in module. Simple insertion into any compatible SFP slot.
  • Connectivity: Wired. Reliable physical link for stable data transfer.
  • Data rate: 1.25Gbps. Supports gigabit Ethernet with headroom for burst traffic.
  • Wavelength: 1310 nm (RX) / 1550 nm (TX). Enables bi-directional transmission over one fibre.
  • Cabling type: Ethernet 1000Base-BX. Standardised for single-mode fibre networks.
  • Max distance: 1.2 miles (1.9 km) per link, extendable to 10 km with paired WDM modules.
  • Power: 3.3 V. Low power consumption for energy-efficient operation.
  • Diagnostics: Digital Diagnostics Monitoring (DDM). Provides real-time performance data.
  • Temperature range: 32 °F to 158 °F. Operates reliably in a wide range of conditions.
  • Compliance: RoHS, CE. Meets environmental and safety regulations.

Specifications
Miscellaneous
Miscellaneous / Compliant StandardsMSA, FCC, EAC, C-Tick, RoHS
Networking
Networking / Form FactorPlug-in module
Networking / Connectivity TechnologyWired
Networking / FeaturesBidirectional, hot swappable, Wavelength Division Multiplexing (WDM), Digital Diagnostics Monitoring (DDM), TCP/IP support
Networking / Data Transfer Rate1.25Gbps
Networking / Optical Wave Length1310 (RX) / 1550 (TX) nm
Networking / Cabling TypeEthernet 1000Base-BX
Networking / Data Link ProtocolGigabit Ethernet
Networking / TypeSFP (mini-GBIC) transceiver module
Networking / Max Transfer Distance1.2 miles
Header
Header / Product LineTP-Link
Header / Packaged Quantity1
Environmental Parameters
Environmental Parameters / Min Operating Temperature32 °F
Environmental Parameters / Max Operating Temperature158 °F
General
General / Device TypeSFP (mini-GBIC) transceiver module
General / Form FactorPlug-in module
Expansion / Connectivity
Expansion / Connectivity / Interfaces1 x Ethernet 1000Base-BX - LC/UPC single-mode female
Power
Power / Voltage Required3.3 V
Summary Details
SFP transceiver typeFiber optic
Maximum data transfer rate1250 Mbit/s
Interface typeSFP
Product colourMetallic
Input voltage3.3 V
Compliance certificatesRoHS
CertificationCE
Quantity per pack1 pc(s)
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