With the Imixs DMS Service it is possible to manage the import of existing documents automatically. The DmsService is responsible for importing files from a file path configured through the DMS configuration client. So for example you can simply copy scanned documents into a upload directory (e.g. c:\imixs_dms). The Imixs DMS Service will import the documents into Blob Workitems and delete them from the file system.
Using the windows tool pscp.exe (http://www.chiark.greenend.org.uk/~sgtatham/putty/) you can simply run the following command
>pscp -pw xxxxxx imixs-upload/* user@myhost:/home/user/test
This will copy all files from the directory imixs-upload/ into the directory /home/user/test on the server 'myhost' connecting with the user account 'user' and the password 'xxxxxx'. Try also pscp -h for additional options like recursive uploads.