TP-Link

Omada 1000BASE-LX Gigabit Single-Mode SFP Module, LC Duplex, 1310 nm, 20 km

SKU TPL-SM311LS Model SM311LS

  • Gigabit 1000BASE-LX optics at 1310 nm, up to 20 km on single-mode fiber
  • LC duplex connector for 9/125 µm single-mode runs
  • Hot-swappable with Digital Diagnostic Monitoring
  • SFP-MSA compliant, rated 32°F to 158°F
  • Fast shipping from four branches
  • 30-day returns on unopened products

Product highlights

  • RangeUp to 20 km
  • Connectivity1000BASE-LX, 1310 nm
  • PortsLC duplex, single-mode

The Omada SM311LS is a 1000BASE-LX Gigabit SFP module for single-mode fiber, rated to 20 km. It is the part for linking a camera closet, a gatehouse or a second building back to the core switch when copper will not reach.

Built for fiber uplinks

The module runs at 1310 nm over 9/125 µm single-mode fiber with an LC duplex connector, and it is hot-swappable, so it can go into a live switch without a reboot. Digital Diagnostic Monitoring reports the optical link's health back to the switch, which helps when you are troubleshooting a long run. It follows the SFP Multi-Source Agreement (SFP-MSA) and is rated from 32°F to 158°F.

Key features

  • Up to 20 km on single-mode fiber at 1.25 Gbps
  • LC duplex, 1310 nm 1000BASE-LX optics
  • Hot-swappable: install or replace with the switch running
  • DDM support for monitoring the optical link

System requirements

A Gigabit SFP slot on a switch or router, and 9/125 µm single-mode fiber with LC connectors. Use a matching 1000BASE-LX single-mode module at the other end of the link.

Specifications

SKUTPL-SM311LS
BrandTP-Link
Form factorGigabit SFP transceiver module
CommunicationEthernet / IP
Power input3.3V from the host SFP slot
Port speedGigabit
Standard1000BASE-LX, IEEE 802.3z
Connector typeLC duplex
Fiber type9/125 µm single-mode
Wavelength1310 nm
Max distance20 km
Data rate1.25 Gbps
Compatibility notesSFP-MSA compliant; fits Gigabit SFP slots
Hardware featuresDDM, hot-swappable
Dimensions2.1 x 0.5 x 0.5 in (55.4 x 13.7 x 12.9 mm)
Operating temp32°F to 158°F (0°C to 70°C)
Operating humidity10 to 90% RH, non-condensing
ComplianceFCC, CE

Documents and resources

FAQs

How far can the SM311LS run?
Up to 20 km over 9/125 µm single-mode fiber.
Does the SM311LS work with multimode fiber?
No. It is a single-mode 1000BASE-LX module. Multimode runs need a multimode SFP.
Do I need the same module on both ends?
Use a matching 1000BASE-LX single-mode module at the far end so wavelength and fiber type line up.
Can I swap it without powering down the switch?
Yes. The SM311LS is hot-swappable.