Comnet 2TX TO 1 FX 100Mbps Media Converter (B) SC Connector mm 1 fiber - CNFE2004M1B

Comnet CNFE2004M1B 2-Channel 100Mbps Media Converter

Overview

The CNFE2004M1B converts two 10/100 Mbps copper Ethernet ports into a single 100 Mbps optical port, solving the distance and isolation problem when running surveillance equipment across long cable runs or in electrically noisy environments. This is the core workhorse for extending network video feeds beyond standard twisted-pair limits — typical deployments place one unit at the camera head-end (electrical in, fiber out) and a mirror unit at the recorder or switch (fiber in, electrical out). Single-mode fiber reach of 20 km (12 miles) means you can separate your camera tier from your core infrastructure without repeaters.

Compatibility

Supports any standard 10/100 BASE-T Ethernet device: IP cameras with RJ-45 output, PoE injectors, network switches, or NVRs. Auto-negotiation on electrical ports handles both 10 Mbps and 100 Mbps speeds, full or half duplex. Automatic MDI/MDI-X crossover eliminates cable type concerns. Optical port accepts ST or SC connectors (CNFE2004M1B uses SC multimode connectors; single-mode variants available separately). The exclusive Demux feature allows port isolation — useful when you need to replicate a media converter pair across a single fiber strand for redundancy or multi-site aggregation.

Installation Notes

Operating temperature range -40°C to +75°C handles outdoor cabinet and unheated warehouse environments. Meets NEMA TS-1/TS-2 and Caltrans traffic signal specifications for harsh industrial settings. Optional 30W or 60W PoE+ models (CNFE2004M1BPOE or CNFE2004M1BPOEHO) can inject power directly into copper ports — powered by 48–56 volt DC supply (sold separately). Link Fault Pass-Through detects copper-side failure and signals the optical port state change, allowing head-end equipment to detect fiber break or camera-side power loss. Wide AC/DC input voltage tolerance handles high-line/low-line supply variations common in remote locations.