Guralp Systems CMG-DCM build <10,000 - Manual (Page 111)

Acquisition Modules and Platinum Firmware Digitiser Configuration
8.1.1.9 Transmission mode
The Transmission mode selections are exactly as defined on the form.
Note that Direct is the default and preferred method of transmission
8.1.1.10 Storage Mode
In the storage mode section, selecting the Reset flash buffers on next digitiser
update check-box will cause all data in the flash storage to be erased and the
read pointers to be reset.
Note: Use this facility with caution. Data will be erased so, if they
are important, ensure that they have been flushed to storage and are
readable before clearing the buffer.
MAN-EAM-0003 111 Issue E - February 2014