[GnomeMeeting-list] other gatekeeper for pc-to-phone than default?

[itlistuser rapideye de]

Hi,   
   
just tried to get gnomemeeting to work with our telephone system. I'll have a   
h.323 capable telephone system and want to use gnomemeeting as their clients.   
In the h.323 configuration i set the gatekeeper and in the logs i can see that  

gnomemeeting connects happily to it. but how do I call an arbitrary number?   
at least from reading the manual the h323: and callto: urls are not the   
choice, so i searched and found the pc-to-phone option. where do I configure   
the ip of the gatekeeper to use for pc-to-phone?   
   
kind regards  
sebastian  
  
  
--    
Sebastian Reitenbach            Tel.: ++49-(0)3381-8904-305      
RapidEye AG                     Fax: ++49-(0)3381-8904-101      
Friedrich-Franz-Str. 19         e-mail:reitenbach rapideye de       
D-14770 Brandenburg             web:http://www.rapideye.de