The T‑BERD/MTS OCC‑4056C DWDM Optical Channel Checker module qualifies DWDM channel frequency and power levels and helps troubleshoot passive DWDM networks such as Fiber Deep, Remote‑PHY, and C‑RAN. It supports C‑band channels from Ch62 to Ch12 with ITU‑T G.692 grids at 50/100/200 GHz spacing and offers both graphical and tabular displays. The module includes slots for up to two SFP/SFP+ DWDM transceivers or one tunable SFP/SFP+, enabling end‑to‑end continuity checks. It also supports power and wavelength drift testing, making it ideal for validating forward and return paths through Mux/Demux and new wavelength routes in modern DWDM deployments.

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