Comnet ComFit Quad 10/100/1000Mbps Multi-Rate Media Converter 100FX/1000FX Selectable - CNMC4SFP

Comnet CNMC4SFP Ethernet-to-Fiber Media Converter

Overview

The Comnet CNMC4SFP is a 10/100/1000 Mbps Ethernet-to-fiber media converter designed for surveillance networks requiring extended copper-to-fiber runs without repeaters or rack infrastructure. The CNMC4SFP accepts copper (RJ45) Ethernet and converts it to 100BASE-FX or 1000BASE-FX optical, selected via DIP switch—meaning you can run a single unit across multiple fiber types without swapping hardware. Power input accepts 48–57 VDC (industrial supply) or optional PoE+ (IEEE 802.3at) sourcing 30W downstream, critical for powering remote fiber termination points or edge access control hardware at distance. Full duplex 10/100/1000 Mbps transmission, auto-negotiation on the copper port, and automatic MDI/MDI-X detection eliminate manual configuration errors on site.

Compatibility

The CNMC4SFP integrates with any surveillance NVR, switch, or access control system using standard 10/100/1000BASE-TX Ethernet. Accepts single-mode or multimode SFP modules (sold separately) tuned to your fiber type and distance—Comnet SFP inventory supports spans to 120 km. Copper-side RJ45 works with category 5e and above. The PoE+ variant (CNMC4SFPPOE) delivers 30W to remote cameras, intercoms, or credential readers; confirm power draw against the 30W ceiling before deployment. Compatible with both ComFit rackmount and mini form factors; this model ships in ComFit (15.5 × 13.5 × 2.8 cm). LED diagnostics on converter and fiber link status aid rapid troubleshooting in multi-unit fiber rings.

Installation Notes

Power consumption is 35W on PoE input or 5W on DC supply—budget accordingly on your power source. Operating temperature range -40°C to +75°C and storage to +85°C suits outdoor fiber cabinets and unheated shelters. Humidity rated 0–95% non-condensing. MTBF exceeds 100,000 hours, typical for industrial switching appliances. SFP modules are field-swappable hot without power-down. Ensure DIP switch configuration matches your target fiber standard (100FX vs. 1000FX) before installation—incorrect setting causes link loss. No special tools or torque specs required; standard rack or wall mount sufficient.

What's in the Box

• 1x Comnet CNMC4SFP media converter (ComFit form factor)
• Power cable and RJ45 cable (exact count and length not specified in evidence)