TP-Link SM311LM Gigabit Multi-Mode SFP Module (LC Duplex) - 850nm
SKU: SM311LMNetworking › Network Accessories
Please enquire before ordering
The distributor has not yet confirmed the latest price and availability (last checked Jun 18, 2026)
092-251-4017Awaiting stock confirmation2 years manufacturer's warranty
GenuineFree delivery from ฿5,000Tax invoice
Small form-factor SFP module for network connectivity via fiber optic cable, supporting 1.25Gbps speed, compatible with TP-Link switches out of the box
Key features
- Supports 1.25Gbps speed over multi-mode fiber optic
- Transmits signals up to 550 meters (50/125μm)
- Supports hot swapping
- Features DDM for real-time operational status monitoring
- Compatible with multiple TP-Link switch and Media Converter models
Product description
The TP-Link SM311LM module is a cost-effective solution for long-distance network connectivity, supporting 1.25Gbps data transmission over multi-mode fiber optic cable using 850nm light. It can transmit signals up to 550 meters with 50/125μm fiber or up to 275 meters with 62.5/125μm fiber, making it ideal for installation in medium-sized buildings or data centers where cable length reduction is required. The module supports hot swapping and features DDM (Digital Diagnostic Monitoring) for real-time monitoring of operational status. It is compatible with SFP ports on TP-Link switches such as the T3700, T2700, T2600, T2500, T1700, T1600, T1500, 2/3/5 Series, and Media Converter MC220L
More features
- Compact size: 2.2 x 0.5 x 0.5 inches (55.4 x 13.7 x 12.9 mm)
- Uses 3.3V power, energy efficient
- Supports IEEE 802.3z, CSMA/CD, TCP/IP standards
- Easy installation with included manual
- Operates within 0–70°C, suitable for real-world environments
Pros and limitations
Pros
- Supports up to 550 meters transmission distance using 50/125μm fiber
- Features DDM for real-time operational status monitoring
- Compatible with multiple TP-Link switches without additional configuration
- Compact size saves space in SFP slot
- Supports hot-swapping without system shutdown
Limitations
- Designed for use only with devices that support SFP ports
- Not compatible with Single-mode fiber optic cables
Who it is for
Ideal for network administrators who need to extend connectivity distance between switches or devices within buildings, especially in small data centers or office environments where copper cable usage should be minimized
Connectivity
LC Fiber Optic
Specifications (21)
- Type
- MiniGBIC Module
- Brand
- TP-Link
- Cable
- Multi-mode Fiber
- Model
- SM311LM (TL-SM311LM)
- Data Rate
- 1.25Gbps
- Interface
- LC Duplex
- Port Type
- LC/UPC
- Fiber Type
- 50/125μm or 62.5/125μm Multi-mode
- Wave Length
- 850nm
- Power Supply
- 3.3V
- Compatibility
- TP-Link T3700 Series, T2700 Series, T2600 Series, T2500 Series, T1700 Series, T1600 Series, T1500 Series, 2/3/5 Series Switches, MC220L Media Converter
- Package Content
- SM311LM, Installation Guide
- Max Cable Length
- 550m (50/125μm), 275m (62.5/125μm)
- Storage Humidity
- 5%~90% non-condensing
- Hardware Features
- DDM, SFP-MSA, Hot Swappable
- Safety & Emission
- FCC, CE
- Operating Humidity
- 10%~90% non-condensing
- Storage Temperature
- -40℃~80℃ (-40℉~176℉)
- Operating Temperature
- 0℃~70℃ (32℉~158℉)
- Dimensions (W x D x H)
- 2.2×0.5×0.5 in (55.4×13.7×12.9 mm)
- Standards and Protocols
- IEEE 802.3z, CSMA/CD, TCP/IP
Datasheets and manuals straight from the manufacturer — select a document to open or download it.
13 questions
Frequently asked questions about this product
Compiled from manufacturer information
Which TP-Link switch models is the SM311LM module compatible with?
This module supports multiple TP-Link switch models such as T3700 Series, T2700 Series, T2600 Series, T2500 Series, T1700 Series, T1600 Series, T1500 Series, 2/3/5 Series, and Media Converter MC220L, provided the switch has an SFP port that supports SFP-MSA
Can it be used with 62.5/125μm fiber?
Yes, this module supports both 50/125μm and 62.5/125μm fiber, and can transmit signals up to 275 meters with 62.5/125μm fiber
How much power does it use? Is additional equipment needed?
The module operates at 3.3V, drawing power directly from the switch or endpoint device, requiring no additional power supply
Can the module be swapped while the system is running?
Yes, since the module supports hot swapping, it can be inserted or removed without shutting down the switch
Does it have a feature to monitor operational status?
Yes, the module supports DDM (Digital Diagnostic Monitoring), allowing network administrators to monitor signal level, temperature, and power consumption in real time
What is the maximum operating distance?
Maximum distance is 550 meters with 50/125μm fiber and 275 meters with 62.5/125μm fiber
Does it require any additional configuration when installed?
No, the module supports SFP-MSA and works immediately upon insertion into an SFP port on a switch without requiring additional configuration
Can it operate in high-temperature environments?
Yes, the module supports operating temperature of 0–70°C and storage temperature of -40–80°C, making it suitable for use in typical office or data center environments
Is it in stock?
We are confirming the latest stock and price of the TP-Link SM311LM Gigabit Multi-Mode SFP Module (LC Duplex) - 850nm with the distributor. Please contact us before ordering at 092-251-4017 or sales@gist.co.th.
How much does it cost?
The distributor has not yet confirmed the latest price and availability. Please contact us before ordering at 092-251-4017 or sales@gist.co.th.
How long is the warranty?
Warranty period: 2-year warranty (manufacturer's terms). 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
2-year warranty
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
