WDM systems generally use DCMs to compensate for chromatic dispersion.

If the DCM configuration is incorrect, the system OSNR will deteriorate.

Compared with line transmission optical fibers, DCMs are prone to non-linear effects. Therefore, the incident optical power of the DCMs must be controlled.

For a 10G system with a fiber length shorter than 400 km, G.652-specific DCMs can be used to compensate for dispersion in G.655 (Leaf) optical fibers.

If the DCM configuration is false, the receive-end performance will deteriorate.