Hi, Is there any possibility that SER requests radius server to check if a user should be allowed to call a specific user. I mean as SER requsts radius upon REGISTRATION, can it send similar radius request upon INVITE? I configured SER with the simplest configuration as explained in Radius How-To. Probably I need to do something in extra to support this functionality. Thanks for your help. jawad __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! http://promotions.yahoo.com/new_mail