You'll have to have a sip path from one to the other.  

originate sofia/profile/1002@other-fs-box 1000


Then make 1002@other-fs-box lead to 1002 thats registered there.  

/b



On Sep 2, 2008, at 5:09 AM, Gayatri Kulkarni wrote:

Also, how to originate calls between endpoints registered to 2 different FSs??
 
Thanks a lot in advance,
Regards,
Gayatri Kulkarni