10/100/1000 Mbps Ethernet Media Converters with 100FX and 1000FX Support + Optional Power over Ethernet (PoE)


Availability: Worldwide

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-40 º to +75 ºC




30W POE+




Made in the USA



The ComNet Ethernet CNMC2+1SFP electrical-to-optical Ethernet media converters accept two 10/100 or 1000 Mbps electrical inputs and converts this to a single 100 or 1000 Mbps optical output (selected by a DIP switch) and the 100/1000 Mbps optical input back to the 10/100/1000 Mbps electrical output. "Auto-Negotiating" is supported on the copper interface side. These devices use either one or two optical fibers, depending upon the selection of sold-separately SFP* optical module. The ComNet exclusive Demux feature allows for port isolation, replicating two media converters over one fiber. The ComNet exclusive Mux feature prevents network video flooding of multicast traffic with DIP switch selection of the fiber port as a dedicated uplink path. The CNMC2+1SFP series can be powered by wide range of AC or DC input power supplies.


  • IEEE 802.3 compliant
  • 10/100/1000 BASE-TX port supports auto-negotiation and automatic MDI/MDI-X crossover for full and half-duplex operation
  • Uses customer-installed ComNet SFPs for compatibility with a wide range of optical fibers, optical connector types, and optical transmission distances of up to 120 km
  • Designed for installation in harsh out-of-plant/ unconditioned industrial or roadside operating environments (-40 º to +75 ºC ambient). Fully compliant with the environmental requirements of NEMA TS-2 for Traffic Signal Control Equipment
  • Voltage transient protection on all power and signal input/ output lines provides protection from power surges and other voltage transient events.
  • Status indicating LEDs provide rapid indication of critical operating parameters
  • Hot-swappable rack modules
  • Mini-package size options allow those units to be installed in those locations where space is at a premium.
  • Supports Jumbo Frames
  • Available in small-size, ComFit interchangeable stand alone or rack unit single and dual models


  • Optical transmission of Ethernet-compatible industrial security access control systems, intercom systems, VOIP (Voice over IP) telephony networks, and IP-compatible CCTV camera surveillance networks
  • Optical Ethernet transmission to wireless LAN access points
  • Industrial Security, Transportation/ITS, and Industrial Control/ Factory Automation IP Networks
  • Optical transmission of any Ethernet-compatible equipment with a maximum data rate of 100 Mbps or 1000 Mbps

Application Diagram(s) (1)

Application Diagram(s) for CNMCSFP Series

Ordering Information

Part NumberDescription
CNMCSFP/MMini 10/100/1000 Mbps Ethernet Media Converter
CNMCSFPPOE/MMini 10/100/1000Mbps Ethernet Media Converter with IEEE 802.3at 30W PoE+
CNMCSFPComFit 10/100/1000Mbps Ethernet Media Converter
CNMC2SFPComFit Dual 10/100/1000Mbps Ethernet Media Converter
CNMC2SFPPOEComFit Dual 10/100/1000Mbps Ethernet Media Converter with IEEE 802.3at 30W PoE+

* Power Supply for PoE applications is sold separately.† Small Form-Factor Pluggable Module. Sold separately.

The power supplies provided with ComNet products are designed for benign 0 º to 50 ºC applications. Hardened power supplies are available; consult the factory to select the right power supply for your application.