download netcat for windows and start it from a DOS box with this command:
nc.exe -l -p 8011 > smdr-%date:~3,2%-%date:~6,2%-%date:~9,4%_%time:~0,2%.%time:~3,2%.txt
8011 is the portnumber stup in IP Office > System > SMDR
the ip address is the ip address of the pc running netcat
the smdr data is stored in a file named like this :
smdr-15-04-2011_12.47.txt