Using my Grandstream GXP 2000 since a few days, I liked to get all my adresses from an electronical addressbook to it. I found the possibillity to upload a phonebook as XML (see [1] and [2]) and so I wrote a small script to convert VCARDS (as for instance exported from kaddressbook) into the appropriate format.

You can download version 0.2 of the script at http://absorb.it/hacked/vcard2gxp.awk

Just call it with the addressbook (in the below example the kde kaddressbook) as a parameter and you can send the output to the file you offer your phone than (in my case /var/www/localhost/htdocs/grandstream/gs_phonebook.xml)

vcard2gxp.awk /home/user/.kde/share/apps/kabc/std.vcf >/var/www/localhost/htdocs/grandstream/gs_phonebook.xml