TP-LINK MM SFP MODULE

TP‑Link TL‑SM311LM is a multi‑mode SFP module employed to expand Gigabit Ethernet over optical fiber. It converts standard network ports into 1000Base‑SX multimode fibre with LC/UPC interface, delivering reliable 1.25 Gbps data flow up to 550 m. Backed by TP‑Link JetStream switches and media converters such as the MC220L and MC200CM, it’s a plug-and-play fibre backbone integration solution.

Key Specifications

• Standards & Protocols: IEEE 802.3z, CSMA/CD, TCP/IP
• Data Rate: GbE support up to 1.25 Gbps (1.063 Gbps Fibre‑Channel)
• Wavelength: 850 nm laser for multimode fiber transmission
• Max Distance: Up to 550 m on 50/125 µm fiber; about 275 m using 62.5/125 µm multimode
• Connector: Duplex LC/UPC optical port
• Form Factor: Hot-pluggable SFP (Mini‑GBIC), SFP‑MSA compliant
• Power Supply: 3.3 V (derived internally from host switch)
• Diagnostic Support: Digital Diagnostic Monitoring (DDM/DOM) support for real-time optical stats
• Compliance: CE, FCC, RoHS certified; laser safety Class 1
• Dimensions: ~55.4 × 13.7 × 12.9 mm (2.2″ × 0.5″ × 0.5″)
• Operating Conditions: 0 °C to 70 °C; storage –40 °C to 80 °C; humidity 10–90% non‑condensing
• Package Includes: TL‑SM311LM module and installation guide

Key Features & Benefits

• Extend Fiber Reach Easily: Enables GbE over multimode fiber to 550 m—ideal for fiber LAN backbones.
• Plug‑and‑Play Design: Hot‑swappable SFP form, no additional configuration required.
• Reliable Diagnostics: Integrated DDM/DOM offers live monitoring of optical parameters.
• Broad Compatibility: Works flawlessly with TP‑Link JetStream switches and media converters like MC220L/MC200CM.
• Industry‑Certified: Industry standard (IEEE, CE, RoHS) for compatibility and quality.
• Thin & Energy‑Efficient: Thin SFP module draws power from the host switch.

Technical Insight

By using a 850 nm VCSEL laser transmitter via LC duplex connectors, the TL‑SM311LM offers stable 1.25 Gbps fibre transmission. Full and half-duplex modes are supported through auto-negotiation. DDM offers host devices real-time reading of optical power and temperature—crucial for enterprise troubleshooting. Easy and clean installation is facilitated by internal powering from switch power.

Typical Applications

• Fiber connection between building segments in an enterprise or campus networks
• Fiber backbone building for TP‑Link JetStream switches
• Increasing network coverage without the limitation of copper cabling
• Ideal partner for TP‑Link MC220L / MC200CM media converters