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TP-Link TL-SM311LM: Gigabit SFP Multi-Mode Fiber Module

★★★★★4.7 (234 reviews)

Reliable gigabit SFP module for extending your network up to 550m over multi-mode fiber with plug-and-play simplicity.

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Overview

The TP-Link TL-SM311LM is a 1000Base-SX compliant MiniGBIC module designed to bring gigabit fiber connectivity to compatible SFP-equipped switches and media converters. Operating at an 850nm wavelength with a 1.25Gbps data rate, this module slots into standard SFP ports on TP-Link JetStream managed switches and works alongside the MC220L media converter for fiber-to-copper bridging. It supports full-duplex communication over multi-mode fiber, reaching up to 550 meters on 50/125μm cable or 220 meters on 62.5/125μm cable, making it well-suited for in-building and campus backbone connections.

Installation is straightforward — the module is hot-swappable and requires no software configuration when used with supported TP-Link hardware. The LC/UPC duplex interface is a standard connector type, and TP-Link includes a protective dust plug to keep the optical bores clean when not connected. For network administrators expanding an existing TP-Link infrastructure with fiber uplinks between floors or buildings, the TL-SM311LM offers a cost-effective and reliable solution without the complexity of more specialized transceivers.

Key Features

Multi-Mode MiniGBIC module, Supports full-duplex

Wave Length: 850nm. Data Rate: 1.25Gbps. Port Type: LC/UPC

Max. Cable Length: 550m(1,800 feet) using 50/125um Multi-Mode Fiber, 220m(720 feet) using 62.5/125um Multi-Mode Fiber

Always keep the protective dust plug on the SFP’s optical bores until you are ready to make a connection

Compatible with all SFP ports on TP-Link product including JetStream switches, and media converter MC220L

Work with MC200CM with multi-mode fiber connection

Specifications

Standard
1000Base-SX
Fiber Type
Multi-Mode
Interface
LC/UPC
Data Rate
1.25Gbps
Wavelength
850nm
Max Distance (50/125μm)
550m (1,800 ft)
Max Distance (62.5/125μm)
220m (720 ft)
Duplex
Full-Duplex
Compatibility
TP-Link JetStream Switches, MC220L

Pros & Cons

👍 Pros

  • Plug-and-play installation with no drivers or configuration needed for compatible TP-Link devices.
  • Supports up to 550 meters of cable distance on 50/125μm multi-mode fiber, suitable for campus and building-wide runs.
  • Compact MiniGBIC form factor fits standard SFP slots without blocking adjacent ports.
  • Hot-swappable design allows module replacement without powering down the switch.

👎 Cons

  • Limited to multi-mode fiber only, requiring a separate module if your infrastructure uses single-mode runs.
  • Maximum distance of 550m is significantly shorter than single-mode alternatives for longer deployments.
  • Officially supported only with TP-Link equipment, which may limit flexibility in mixed-vendor environments.
  • Gigabit speed only — does not support 10G SFP+ for higher-bandwidth needs.

Frequently Asked Questions

It requires multi-mode fiber optic cable. It supports both 50/125μm fiber (up to 550m range) and 62.5/125μm fiber (up to 220m range) with LC/UPC connectors.
TP-Link officially lists compatibility with its own JetStream switches and the MC220L media converter. Compatibility with third-party switches that accept standard 1000Base-SX SFP modules is possible but not guaranteed by TP-Link.
No. This is a multi-mode only module operating at 850nm wavelength. For single-mode fiber connections, you would need a different SFP module such as the TP-Link TL-SM311LS.
It supports a data rate of 1.25Gbps with full-duplex operation, conforming to the 1000Base-SX standard for gigabit Ethernet over fiber.

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