TP-Link SM311LS Gigabit Single-Mode SFP Module (1310nm) - 20km
SKU: SM311LS-VER5.2Networking › Network Accessories
฿432
Price includes 7% VATPrice updated November 1, 2026
In stockManufacturer's warranty
For orders placed before 12:00 on a business day; weekends excluded
GenuineFree delivery from ฿5,000Tax invoice
Single-mode fiber optic SFP module supporting up to 20 kilometers of transmission distance. Works immediately with TP-Link switches and features DDM and Hot-Swappable functionality.
Key features
- Supports up to 20 kilometers of transmission distance
- Compatible with single-mode fiber optic cables, 9/125 μm
- Supports DDM for real-time signal status monitoring
- Hot-Swappable, allowing module replacement during operation
- Supports SFP-MSA standard, compatible with multiple switch models
Product description
The TP-Link SM311LS SFP module is designed to extend data transmission distance in LAN networks over single-mode fiber optic cables, supporting signal transmission up to 20 kilometers at a wavelength of 1310 nm and compliant with IEEE 802.3z standards. This makes it ideal for long-distance connections in large buildings, data centers, or enterprise networks requiring stability and extended reach. The module supports Digital Diagnostic Monitoring (DDM) for real-time signal status monitoring and is Hot-Swappable, enabling replacement during operation to minimize system downtime and improve maintenance flexibility.
More features
- Consumes only 3.3V, energy efficient
- Designed for industrial environments (0–70°C)
- Supports storage temperature range of -40°C to +85°C
Pros and limitations
Pros
- Supports up to 20 kilometers of maximum transmission distance, delivering real-world performance over long distances
- Features DDM for real-time signal status monitoring, helping prevent network issues
- Engineered for Hot-Swappable operation, reducing downtime during maintenance
- Supports SFP-MSA standard, compatible with multiple TP-Link switch models
- Uses low power consumption of only 3.3V, energy efficient and reduces heat generation
Limitations
- Requires use with switches that support SFP or MiniGBIC ports only
- Not compatible with multi-mode fiber optic cables
Who it is for
Ideal for organization users who need to extend network reach within large buildings, data centers, or inter-building networks, especially with TP-Link T-series and Omada switches
Connectivity
LC
Specifications (24)
- Brand
- TP-Link
- Model
- SM311LS (TL-SM311LS)
- Data Rate
- 1.25 Gbps
- Port Type
- LC Duplex
- Cable Type
- Single-Mode Fiber
- Fiber Type
- 9/125 μm Single-Mode
- Form Factor
- MiniGBIC
- Wave Length
- 1310 nm
- Power Supply
- 3.3V
- Product Type
- SFP Module
- Compatibility
- SFP-MSA
- Hot-Swappable
- Yes
- Interface Type
- LC Duplex
- Max Cable Length
- 20 KM
- Package Contents
- SFP Module SM311LS, Installation Guide
- Storage Humidity
- 5–90% RH, Non-Condensing
- Hardware Features
- DDM, SFP-MSA, Hot Swappable
- Safety & Emission
- FCC, CE
- Operating Humidity
- 10–90% RH, Non-Condensing
- Storage Temperature
- -40–85 °C (-40–185 °F)
- Operating Temperature
- 0–70 °C (32–158 °F)
- Dimensions (W x D x H)
- 2.2 x 0.6 x 0.5 in (55.4 x 14.6 x 12.9 mm)
- Standards and Protocols
- IEEE 802.3z, CSMA/CD, TCP/IP
- Digital Diagnostic Monitoring (DDM)
- Support
Datasheets and manuals straight from the manufacturer — select a document to open or download it.
12 questions
Frequently asked questions about this product
Compiled from manufacturer information
Which TP-Link switch models is this module compatible with?
Compatible with TP-Link switches T3700, T2700, T2600, T2500, T1700, T1600, T1500, 2/3/5 Series, and MC220L, provided they have available SFP or MiniGBIC ports
Can this module be used with single-mode fiber optic cables?
Yes, this module is designed exclusively for single-mode fiber optic cables with 9/125 μm core diameter. It will not function with multi-mode fiber cables
How far can the signal be transmitted?
Supports up to 20 kilometers of transmission distance over single-mode fiber optic cables, 9/125 μm, when used with equipment supporting 1000Base-LX standard
Can the signal status be monitored?
Yes, this module supports Digital Diagnostic Monitoring (DDM), allowing users to monitor signal level, temperature, voltage, and optical power in real time through network management systems
Can the module be replaced while the network is active?
Yes, this module supports Hot-Swappable functionality, meaning it can be inserted or removed while the switch is operating without disrupting network connectivity
How much power does it consume?
Operates at only 3.3V, a standard voltage for SFP modules, with efficient power management
What is the operating temperature range?
Operates within temperature range of 0–70°C and can be stored between -40°C and +85°C, making it suitable for industrial or equipment room environments with high temperatures
Is it in stock?
The TP-Link SM311LS Gigabit Single-Mode SFP Module (1310nm) - 20km is in stock and ready to ship. Orders placed before 12:00 on a business day are delivered within 1–3 business days (Bangkok and vicinity) or 2–5 business days (other provinces). Order online at store.gist.co.th or contact our sales team at 092-251-4017.
How much does it cost?
The price is ฿432 (including 7% VAT). It is in stock and ready to ship. Business customers can request a quotation at sales@gist.co.th.
How long is the warranty?
The warranty follows the manufacturer's terms for each model; ask our sales team for the warranty period of this model. To make a warranty claim, call 092-251-4017 or 065-523-5262, or email sales@gist.co.th (Mon–Fri 9:00–18:00), then send the product with your order number to our head office, or bring it to the head office in person.
How long does delivery take?
Orders placed before 12:00 on a business day are delivered within 1–3 business days (Bangkok and vicinity) or 2–5 business days (other provinces). Free delivery on orders of ฿5,000 or more (a ฿150 delivery fee applies below this amount).
Is it genuine?
Genuine products sourced from distributors in Thailand, covered by the manufacturer's warranty. Full tax invoices are available.
Didn't find the answer you need?
Loading reviews…
Genuine products
Sourced from distributors in Thailand and covered by the manufacturer's warranty
Warranty period
According to the manufacturer's terms for each model
Covered by the manufacturer's warranty; you can make claims through GIST
Claims through GIST
Ship the product to our head office or bring it in person
Warranty conditions
- A receipt or other proof of purchase is required
- The product must not have been modified or altered
- Damage caused by misuse is not covered by the warranty
- To make a warranty claim, call 092-251-4017 or 065-523-5262, or email sales@gist.co.th (Mon–Fri 9:00–18:00), then send the product with your order number to our head office, or bring it to the head office in person.Head office: 554 Sky Nine Center, Floor 12A, Room 554/62, Asok-Din Daeng Road, Din Daeng Subdistrict, Din Daeng District, Bangkok 10400
More in Network Accessories
Price
฿432