Ubiquiti CWDM Mux Demux 4 (UACC-CWDM-4) – Rack-Mount 4-Channel CWDM Multiplexer for Fiber Capacity Expansion

The Ubiquiti CWDM Mux Demux 4 (UACC-CWDM-4) is a professional-grade 4-channel CWDM (Coarse Wavelength Division Multiplexing) multiplexer/demultiplexer designed to dramatically increase the capacity of your existing single-mode fiber infrastructure — without adding new physical cables. By combining four independent optical wavelengths onto a single fiber pair, the UACC-CWDM-4 delivers a scalable, cost-efficient path for growing network bandwidth demands.

Housed in a compact 1U rack-mount enclosure with rugged SGCC steel construction, the CWDM Mux Demux 4 features four 1270/1290/1310/1330 nm channel ports, a duplex LC UPC communication port for pairing with another mux/demux unit, and a dedicated monitor port for seamless real-time performance analysis with a power meter or optical spectrum analyzer.

Key Features

• 4-Channel CWDM Mux/Demux: Multiplex 4 independent optical channels over a single fiber pair
• Wavelength Coverage: 1270 nm / 1290 nm / 1310 nm / 1330 nm channel ports
• Duplex LC UPC Communication Port: Pair with a second CWDM Mux Demux 4 using single-mode fiber
• Dedicated Monitor Port: Convenient LC/UPC output for real-time signal monitoring
• Low Insertion Loss: Maximum <1.5 dB for reliable long-distance performance
• High Return Loss: Minimum 50 dB for signal integrity
• Excellent Channel Isolation: Adjacent channels up to 30 dB, non-adjacent channels 40 dB minimum
• Compact 1U Rack-Mount Form Factor: Slim design fits into any standard networking rack
• Rugged SGCC Steel Enclosure: Built for demanding data center and telecom environments
• Wide Operating Temperature Range: -30°C to 75°C for versatile installation scenarios
• NDAA Compliant: Suitable for government and security-conscious deployments

Port Layout

• (4) Channel Ports: 1270 / 1290 / 1310 / 1330 nm (LC/UPC)
• (1) COM Port: Duplex LC/UPC for interconnection with another CWDM Mux Demux 4
• (1) MON Port: Duplex LC/UPC for optical monitoring and diagnostics

Optical Performance

• Channel Center Wavelengths: 1270 / 1290 / 1310 / 1330 nm
• Min. Channel Passband: ±6.5 nm
• Insertion Loss: <1.5 dB (Max.)
• Return Loss: 50 dB (Min.)
• Isolation: Adjacent Channel Max. 30 dB / Non-Adjacent Channel Min. 40 dB
• Max. Power Handling: 500 mW
• Max. Passband Ripple: 0.3 dB
• Max. Polarization Dependent Loss: 0.1 dB
• Max. Polarization Mode Dispersion: 0.1 ps
• Min. Directivity: 55 dB

Technical Specifications

The Ubiquiti CWDM Mux Demux 4 (UACC-CWDM-4) is a smart, cost-effective way to multiply the capacity of your existing fiber infrastructure without deploying new cables. Ideal for ISPs, data centers, campus networks, and enterprise environments, it delivers passive optical multiplexing performance with the reliability and build quality Ubiquiti is known for.