Ubiquiti UACC-CWDM-4 – UniFi 4-Channel CWDM Mux Demux 1270–1330nm
Overview
The Ubiquiti UACC-CWDM-4 is a rack-mountable 4-channel CWDM multiplexer/demultiplexer designed to increase capacity over existing single-mode fiber infrastructure. It combines four optical wavelengths onto a shared fiber pair and provides separate channel, common, and monitoring interfaces.
The unit provides four CWDM channels at 1270nm, 1290nm, 1310nm, and 1330nm. A duplex LC/UPC COM port provides the common optical connection, while a duplex LC/UPC MON port supports optical monitoring with suitable test equipment.
Technical Information
The UACC-CWDM-4 uses SMF-28e single-mode fiber with 0.9mm white LC/UPC pigtails. It supports a minimum channel passband of ±6.5nm, maximum insertion loss below 1.5dB, minimum return loss of 50dB, and maximum power handling of 500mW.
Optical isolation is specified at a maximum of 30dB between adjacent channels and a minimum of 40dB between non-adjacent channels. Maximum passband ripple is 0.3dB, maximum polarization dependent loss is 0.1dB, polarization mode dispersion is 0.1ps, and minimum directivity is 55dB.
Compatibility
The UACC-CWDM-4 is designed for single-mode fiber CWDM deployments using its 1270nm, 1290nm, 1310nm, and 1330nm channel wavelengths. The COM interface can link to another CWDM Mux Demux 4 using a pair of single-mode fiber cables. The MON interface is intended for optical observation using compatible power meters or optical spectrum analyzers.
Deployment requires optical transceivers or network equipment matched to the corresponding CWDM wavelengths. The mux/demux itself does not provide Ethernet conversion or optical signal regeneration.
Key Features
- 4-channel CWDM multiplexing and demultiplexing
- 1270nm, 1290nm, 1310nm, and 1330nm channel wavelengths
- Duplex LC/UPC COM and MON interfaces
- Less than 1.5dB maximum insertion loss
- Rack-mountable SGCC steel enclosure with 1.4kg weight
Applications
The UACC-CWDM-4 is suited to network deployments where multiple optical channels need to share an existing single-mode fiber pair. Typical applications include campus fiber aggregation, data-center interconnects, and other infrastructure where additional optical capacity can be obtained through wavelength multiplexing.
DC Supplies Product Note
For a CWDM link, verify that the optical transceiver wavelength at each endpoint matches the intended UACC-CWDM-4 channel. The four channels are fixed at 1270nm, 1290nm, 1310nm, and 1330nm; the unit should not be treated as a generic wavelength-agnostic fiber splitter.
Specifications
| Specification | Details |
|---|
| Brand | Ubiquiti |
| Part Number / MPN | UACC-CWDM-4 |
| Product Type | 4-Channel CWDM Mux/Demux |
| Channel Count | 4 CH |
| Channel Center Wavelengths | 1270 / 1290 / 1310 / 1330 nm |
| Fiber Type | SMF-28e single-mode fiber |
| Connector | COM LC/UPC; MON LC/UPC; 4 channel LC/UPC |
| Pigtail and Connector Type | 0.9 mm white LC/UPC |
| Fiber Length | ≥0.5 to 1 m |
| Minimum Channel Passband | ±6.5 nm |
| Maximum Insertion Loss | <1.5 dB |
| Return Loss | 50 dB minimum |
| Isolation | Adjacent channel: 30 dB maximum; non-adjacent channel: 40 dB minimum |
| Maximum Passband Ripple | 0.3 dB |
| Maximum Polarization Dependent Loss | 0.1 dB |
| Maximum Polarization Mode Dispersion | 0.1 ps |
| Minimum Directivity | 55 dB |
| Maximum Power Handling | 500 mW |
| Enclosure Material | SGCC steel |
| Dimensions | 442 × 120 × 43.7 mm |
| Weight | 1.4 kg |
| Operating Temperature | -30 to 75°C |
| Storage Temperature | -40 to 90°C |
| NDAA Compliant | Yes |
FAQs
What wavelengths does the UACC-CWDM-4 support?
The four fixed CWDM channels are 1270nm, 1290nm, 1310nm, and 1330nm.
What fiber type is required?
The UACC-CWDM-4 is specified for SMF-28e single-mode fiber.
What connectors are used?
The COM, MON, and channel interfaces use LC/UPC connectors.
What is the maximum insertion loss?
Ubiquiti specifies maximum insertion loss below 1.5dB.
Can the monitor port be used for optical testing?
Yes. The duplex LC/UPC MON port is intended for observation with a suitable power meter or optical spectrum analyzer.
