11.5  Use of header field

   1 service header_field {
       processing {
         dialog { 
           response incoming INVITE() {
   5 
             if (FROM == 'sip:wife@fwd.com') {
               return forward;
             }
             else {
  10           return forward 'sip:phoenix-contact@enseirb.fr';
             }
           }
         }
       }
  15 }