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TL-SM321A-2
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1000BASE-BX WDM BI-DIRECTIONAL SFP MODULE
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Name:
TL-SM321A-2
- Description:
- 1000BASE-BX WDM BI-DIRECTIONAL SFP MODULE
- Rating:
Added to cart 28 times recently
- Availability:
2 In stock - Ready to Ship
- Brand:
- Tp-Link
- Condition:
Certified Refurbished
Professionally inspected, bench-tested, and firmware-verified, with configurations wiped. Restored to full working order and backed by our warranty.
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TL-SM321A-2 Overview
TL-SM321A-2 is built on a modular architecture designed for high-performance networking. It provides multiple power options with a redundant AC power supply, dual WAN and four LAN interfaces, and integrated voice and video services that ensure reliable connectivity across diverse network deployments.
TL-SM321A-2 delivers robust VPN features—including IPSec and SSL VPN—along with high throughput capacity and redundant performance to meet enterprise-level requirements. Its modular capabilities, stacking support, and enhanced firewall security make it ideal for critical business applications and advanced network environments.
TL-SM321A-2 price is is available on request. Get immediate quote.
Request bulk order quote for TL-SM321A-2 for additional pricing. Browse the full Tp-Link Routers series or explore all Tp-Link products.
TL-SM321A-2 Specifications
- Product Type
- Enterprise Router
- Brand
- Tp-Link
- VPN Support
- IPSec / SSL VPN
- Power Source
- AC Power Supply with Redundant Option
- Routing Protocols
- OSPF / BGP / Static Routing
- Architecture
- Modular
- WAN Configuration
- Dual WAN
- WAN Ports
- 2 WAN Ports
- LAN Ports
- 4 LAN Ports
- Ethernet Technology
- 10/100/1000
- Connectivity Type
- Wired
- Network Protocols
- IPv4 / IPv6 / TCP / UDP
- Remote Management
- HTTP / HTTPS / SNMP / CLI
- Compliance Standards
- FCC / CE
- Wireless Support
- No
- Speed/Capacity
- Gigabit
- Firewall Features
- Yes
- Features
- VPN / Firewall / IPv6 Compatible
- Use Case
- Enterprise
- Management
- Managed
- Form Factor
- Rack-mount
- Integrated Services
- Voice / Video
- High Availability Support
- Supported
- Throughput Capacity
- 1 Gbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall / Intrusion Prevention
- Expansion Slots
- SFP+
- Modular Slots Available
- 2 Slots
- Stacking Capability
- Yes
- 5G Support
- No
- Memory
- 1 GB
- Flash Memory
- 256 MB
- Interface Ports
- RJ-45 / SFP
- Power
- 50W
- Device Type
- Router
- Product Name
- TL-SM321A-2
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 15 inches
- Weight
- 8 lbs
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Product Comparison Table 
| TL-SM321A-2 |  ARCHER AX53 |  ARCHER AX6000 |  ARCHER C7 |  TL-R605 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Fixed | Fixed | Fixed | Fixed |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall | Firewall | Firewall | Firewall / Intrusion Prevention |
| Compliance Standards | FCC / CE | FCC, CE, RoHS | FCC, CE, RoHS | FCC, CE | FCC / CE / RoHS |
| Connectivity Type | Wired | Wired / Wireless | Wired / Wireless / Ethernet | Wired / Wireless | Wired |
| Device Type | Router | Router | Router | Router | Router |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Features | VPN / Firewall / IPv6 Compatible | VPN / IPv6 Compatible / Firewall | VPN, IPv6 Compatible, Firewall | Dual Band, Guest Network, QoS, WPS | VPN / Firewall / IPv6 Compatible |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 256 MB | 256 MB | 16 MB | 256 MB |
| Form Factor | Rack-mount | Desktop | Desktop | Desktop | Desktop |
| High Availability Support | Supported | Not Supported | Not Supported | Not Supported | Supported |
| Interface Ports | RJ-45 / SFP | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 8 LAN Ports | 4 LAN Ports | 4 LAN Ports |
| Management | Managed | Unmanaged | Managed | Managed | Managed |
| Memory | 1 GB | 512 MB | 1 GB | 128 MB | 512 MB |
| Network Protocols | IPv4 / IPv6 / TCP / UDP | 802.11a/b/g/n/ac/ax | 802.11ax, 802.11ac, 802.11n | IEEE 802.11a/b/g/n/ac | IPv4 / IPv6 |
| Power | 50W | 24 W | 65W | 12V/1A | 20 W |
| Power Source | AC Power Supply with Redundant Option | AC Power Supply | AC Power Supply | AC Power Supply | DC Power Supply |
| Product Name | TL-SM321A-2 | TP-Link Archer AX53 | TP-Link Archer AX6000 | TP-Link Archer C7 AC1750 Wireless Dual Band Gigabit Router | TP-Link TL-R605 Gigabit Multi-WAN VPN Router |
| Product Type | Enterprise Router | Wireless Router | Wireless Router | Wireless Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | HTTP / HTTPS / SNMP / CLI | Web GUI, TP-Link Tether | Web Interface, TP-Link Tether App | Web-based management | HTTP/HTTPS / SNMP |
| Routing Protocols | OSPF / BGP / Static Routing | Static Routing | Static Routing / N/A | Static Routing | Static Routing |
| Speed/Capacity | Gigabit | Gigabit | 2.5gb | AC1750 | Gigabit |
| Stacking Capability | Yes | No | No | No | No |
| Throughput Capacity | 1 Gbps | 3 Gbps | 6 Gbps | AC1750 | 3.5 Gbps |
| Use Case | Enterprise | Small Business | Small Business | Home / Small Business | Small Business |
| WAN Configuration | Dual WAN | WAN | WAN | WAN | Dual WAN |
| WAN Ports | 2 WAN Ports | 1 WAN | 1 WAN | 1 WAN | 2 WAN |
| Wireless Support | No | Yes | Yes | Yes | No |
Compliance & Warranty
100% Genuine Product Guarantee
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
Up to 3-Year Warranty Coverage
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
Hassle-Free RMA & Returns
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Rigorously Tested & Quality Assured
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Expert Technical Support
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
Fast Global Delivery
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Reviews & Ratings
D
David Laurent
5
1000BASE-BX SFP module provides stable fiber connectivity.
F
Fatou Ndiaye
4
Reliable single-fiber transmission with consistent Gigabit speeds.
I
Ivan Petrovic
5
Easy installation and dependable optical performance.
L
Leah Morgan
4
Professional WDM SFP for enterprise networking.
S
Samuel Ortiz
5
Stable throughput for long-distance links.
Questions & Answers
What is the TL-SM321A-2 1000BASE-BX WDM Bi-Directional SFP Module?
The TL-SM321A-2 is a single-mode, bi-directional 1 Gbps SFP transceiver using WDM technology to transmit and receive data over one fiber strand.
What is the maximum link distance supported by TL-SM321A-2?
The TL-SM321A-2 supports distances up to 20 km over single-mode fiber at standard attenuation.
Which fiber type is required for the TL-SM321A-2?
The TL-SM321A-2 requires single-mode (SMF) fiber to achieve its specified reach and performance.
What wavelengths does the TL-SM321A-2 operate on?
The module transmits at 1310 nm and receives at 1550 nm, enabling WDM bi-directional operation on one fiber.
What connector interface does the TL-SM321A-2 use?
It features a standard LC duplex connector for simple plug-and-play installation.
Can the TL-SM321A-2 be hot-swapped?
Yes, the TL-SM321A-2 is fully hot-swappable and can be inserted or removed without powering down the host device.
Which network devices are compatible with the TL-SM321A-2?
The TL-SM321A-2 is compatible with all 1000BASE-SX/LX/BX-compliant SFP ports from major vendors, including TP-Link, Cisco, Juniper, HP, and more.
Does the TL-SM321A-2 support digital diagnostics monitoring (DDM)?
Yes, it complies with SFF-8472 DDM standards for real-time monitoring of optical power, temperature, and supply voltage.
What is the data rate of the TL-SM321A-2?
The TL-SM321A-2 delivers a fixed 1 Gbps data rate for reliable Gigabit Ethernet and Fiber Channel applications.
What is the operating temperature range of the TL-SM321A-2?
The module operates reliably between 0 °C and 70 °C (32 °F to 158 °F) ambient temperature.
What is the typical power consumption of the TL-SM321A-2?
The TL-SM321A-2 consumes less than 1 W, ensuring low power usage and minimal heat generation.
Is the TL-SM321A-2 compliant with industry standards?
Yes, it meets IEEE 802.3z (1000BASE-BX) and SFF-8431/SFF-8472 specifications and is RoHS compliant.
How do I install the TL-SM321A-2 in my switch or router?
Simply align the LC connector, insert the module into an empty SFP slot until it clicks, then connect your SMF cable.
How can I troubleshoot a link failure with TL-SM321A-2?
Check fiber polarity, inspect connectors for damage, verify matching Bi-Di module wavelengths at each end, and review DDM readings.
What is the difference between a Bi-Directional SFP and a standard SFP?
Bi-Directional SFPs like the TL-SM321A-2 transmit and receive on different wavelengths over a single fiber strand, while standard SFPs use two fibers.
How many TL-SM321A-2 modules are required for a full link?
You need a matched pair of opposite-wavelength modules—one TL-SM321A-2 (1310 nm TX/1550 nm RX) and its complementary SFP—for each fiber link.