The .dcf file format is a gzip file with some stuff prepended and appended.

To convert it to plain text / XML:

Open the file in a binary-safe editor.

At the beginning will be a string like 'wapac02_dkbs_dap26950' -- remove this
and save the file.

Now pipe the file to gzip -- gzip will complain about 'unexpected end of
input', so it won't just decompress in place, but this works:

cat config.dcf | gunzip > out.xml