6-Port Unmanaged Ethernet Switch / Daisy-Chain and Star Fiber Optic Converter (Industrial / Single-Mode / ST)

USW-1206-FO (SM/ST)

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The USW-1206-FO (SM/ST) is a rugged, fan-less, industrial-grade, 6-port unmanaged 10/100M Ethernet switch and fiber optic media converter that supports daisy-chain and star fiber optic links. The USW-1206-FO supports up to 255 fiber nodes, and each fiber node can extend the 10/100M Ethernet’s distance to 25 miles (40km) for single-mode converters and cables, or 1.2 miles (2km) for multi-mode converters and cables. The unit features redundant power supplies and power failure alarm outputs for uninterrupted system performance and easy maintenance. The USW-1206-FO features 4 unmanaged 10/100M Ethernet ports and 2 full-duplex optical fiber ports and it runs on a light-speed fiber backbone inherently resistant to radio and electrical interference, such as EMI/RFI, transient surges and ground loops. It overcomes the limitations of a conventional point-to-point fiber network and dramatically expands the Ethernet network in terms of distance and flexibility. The USW-1206-FO is a plug and play unit featuring auto-negotiation for 10 or 100M data rates, it also supports MDI (straight-through) and MDI-X (auto-crossover), no DIP switch or jumper settings are required. The product can be mounted directly on a DIN Rail, without a need of using any unsecured DIN-Rail brackets or adapters.

CommFront's products quality is ensured by our ISO-9001 quality control system (Cert No. SG12/04213, strictly certified by SGS), and we back our high-quality Ethernet Switch products with a 5-year replacement warranty and a 30-day risk-free money-back guarantee.


  • Rugged industrial-grade 10/100M Unmanaged Ethernet Switch and Fiber Optic Converter.
  • Daisy-chain and star fiber network expands the Ethernet network dramatically.
  • Designed for harsh industrial environments (DIN-Rail mounting).
  • 4x RJ45 ports for 10/100M Ethernet (auto-negotiation).
  • 2x full-duplex 100M Fiber Optic ports (ST, SC, or FC connectors).
  • Supports up to 255 fiber nodes with ST, SC or FC fiber optic connectors.
  • Full redundant power supply and power alarm relay output.
  • Plug and play, no DIP switch or jumper settings are required. 
  • Supports MDI and MDI-X auto-crossover.
  • Protects against ESD (15kV), overload current, reversed power polarity, and broadcast storm.
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Compliance: CE, FCC.
  • 5-Year manufacturer’s warranty.


Part Number: USW-1206-FO (SM/ST)
Compatibility: IEEE802.3; IEEE802.3u; IEEE802.3x
Power Source: 12 to 48 VDC (redundant dual inputs; power alarm relay output)
Power Consumption: <5W
Ethernet Switch Type: Unmanaged/Layer 2
MAC Table: 1K
Protection: Up to 15kV ESD; Power overload; Reversed power polarity; Broadcast storm
Wavelength: 1310nm
FO Connector Type: PC/UPC
Usable Fiber Optic Cables: Single-mode: 8.3/125, 8.7/125, 9/125, 10/125µm;
Multi-mode: 50/125, 62.5/125µm
Maximum Number of Fiber Nodes: 255
Distance (Fiber): Single-mode: 25 miles (40km) per fiber node;
Multi-mode: 1.2 miles (2km) per fiber node
Distance (Ethernet): 328ft (100m)
Connectors (Ethernet): 4x RJ45
Connectors (Fiber Links): 4x ST, 4x SC, or 4x FC Connectors
Connectors (Power): 6-way terminal block (2x V1 power, 2x V2 power, 2x alarm)
Dimensions (H x W x D): 6.1x4.1x1.3 in (154x105x33 mm) – excluding FO connectors
Weight: 1 lb (450 g)
Operating Temperature: -40ºF to 185ºF (-40ºC to 85ºC)
Operating Humidity: 5% to 95% RH (no condensation)







CommFront products are strictly certified by SGS and/or TUV - the Nationally Recognized Testing Laboratories [NRTLs] in North America (approved by OSHA) and the Notified Bodies in the European Union. Learn More




CommFront products are designed and manufactured to ISO 9001 standards. Our quality control system is strictly certified by SGS (Cert No. SG12/04213). Learn More




CommFront products have been proven to be reliable. We back our high-quality products with a 5-year replacement warranty and a 30-day risk-free money-back guarantee. Learn More

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