Preserve wavelength discipline in dense metro and service-provider transport with an 8-channel DWDM mux/demux designed for 400G deployments. The H-Series package spans 192.1 to 192.8 THz and includes extension and monitor ports, giving operators the control points needed for commissioning, testing, and ongoing optical supervision. Its compact 84 mm footprint suits space-constrained shelves and high-density line systems where every millimeter counts. The specified link-loss and insertion-loss characteristics help engineers plan around real optical budgets instead of guessing at margin. That matters when you are extending reach, protecting service levels, or fitting another circuit into an already crowded span. Built for environments where transport hardware must be predictable, this module is a strong fit for backbone aggregation, metro interconnect, and wavelength grooming at the edge of the optical layer. It is the kind of component chosen when the network design has already moved beyond basic transport and now depends on disciplined channel placement, stable passives, and clean operational visibility.