The TP-Link SM311LS (8-pack) SFP module set is designed to extend 1000BASE-LX Gigabit Ethernet connectivity over single-mode fiber up to 20 km , ensuring high performance and stability. Compatible with the SFP-MSA standard and IEEE 802.3z protocols, it integrates the DDM (Digital Diagnostic Monitoring) function to monitor parameters such as optical power and temperature in real time. The hot-pluggable design allows quick installation and replacement without service interruption, offering maximum flexibility for corporate networks, providers and data centers. With FCC and CE certifications, it represents a safe, efficient and professional solution. Omada
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SM311LS (8-pack) | Mini-GBIC SFP Module Supports Connectivity Up to 20km

The TP-Link SM311LS (8-pack) SFP module set is designed to extend 1000BASE-LX Gigabit Ethernet connections over single-mode fiber up to 20 km, ensuring stability and high performance. Compatible with the SFP-MSA standard and IEEE 802.3z protocols, it offers maximum interoperability. Equipped with DDM for diagnostic monitoring and a hot-pluggable design, it allows for quick installation and replacements without service interruption. FCC and CE certified, it is the ideal solution for enterprise networks and data centers that require reliability and long transmission distances.
Main specifications:
- Pack of 8 SM311LS SFP Modules
- Gigabit 1000BASE-LX connections up to 20 km
- Digital Diagnostic Monitoring (DDM) support
- Hot-Pluggable design for flexible installation
- Compatibility with SFP-MSA and IEEE 802.3z standards
Further details
Technical data sheet
Model | SM311LS |
MEDIA CONVERTER & MODULE | |
Standards & Protocols | IEEE 802.3z, TCP/IP |
Wavelength | 1310 nm |
Dimensions (L x W x H) | 2.2*0.6*0.5 in (55.4*14.6*12.9 mm) |
Diet | 3.3V |
Safety & Emissions | FCC, CE |
Cable | Single-Mode Fiber |
Fiber type | 9/125 μm Single-Mode |
Max. cable length | 20 KM |
Data transmission speed | 1.25 Gbps |
Door type | LC Duplex |
Hardware Features | DDM SFP-MSA Hot Swappable |
Package Content | SFP Module SM311LS (TL-SM311LS) Installation Guide |
Environment | 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 |