The CMG-DCM is the precursor of the CMG-EAM. It is a versatile Linux-based module for storing and transmitting data captured using a range of seismic measuring equipment. GCF data can be gathered from one or more compatible digitizers or digital instruments and stored in its on-board Flash memory, from where it is written from time to time to a USB hard disk or forwarded to another device on your network. Once data are on the hard disk, you can connect to the DCM in various ways to retrieve it.