Cisco ONS 15216 Dispersion Compensator UnitAs metropolitan networks evolve from early 2. 5 generation services toward 10G and beyond, the need to precisely manage chromatic dispersion becomes critical. The Cisco ONS 15216 Dispersion Compensator Unit (DCU) is purpose built to address the dispersion challenges inherent in high speed optical transport. By delivering targeted dispersion compensation within Ciscos ONS 15216 framework, this DCU helps network operators extend reach, preserve signal