Viavi Solutions COSA-4055 Optical Spectrum Analyzer Module

The Viavi COSA-4055 Optical Spectrum Analyzer Module is a plug-in CWDM optical analyzer that delivers precise optical wavelength and power measurements from 1260 to 1630 nm, complemented by a spectrum analysis display for fast spectral characterization. Designed to slot into T-BERD/MTS and OneAdvisor test platforms, this field-interchangeable module supports fiber optic network testing during installation, maintenance, troubleshooting, and upgrades. It targets telecommunications and data networks and is used by maintenance teams, fiber optic technicians, and system integrators for wavelength verification, channel monitoring, and spectral analysis to diagnose and verify performance. Key specifications include Manufacturer Viavi, Model COSA-4055, Technology CWDM Optical Analysis, Wavelength Range 1260–1630 nm, Function Optical Wavelength and Power Measurement, Display Spectrum Analysis Display, Form Factor Plug-In Test Module, Installation Type Field Interchangeable Module, and Compatible Platforms T-BERD/MTS and OneAdvisor.