[T48G] Softkey XML Browser Action

Hello,

I´m trying to syncronize our telephone with our intranet-time-registration system.

I created 3 softkeys (login, logoff,pause) of type "xml browser" and the following actions:

http://intranet/zeiterfassung_neu/starface_user.php?uid=<MY_USERID>&status=<TIMESTATUS>&keynumber=<KEY>

So - everything is working fine - but I always have to use static values for UserID, Status & KeyNumber...

Is there a possibility to use predefined parameters - such as "IP","USERNAME" e.q.?

I found some examples - $mac,$ip - but these parameters only work as an "action url" - not for softkeys

Thanks for any advice!