11.9  Selection according to an expression

   1 service selection {
       processing {
         dialog {
           response incoming INVITE() {
   5         select (FROM) {
               case 'sip:9336@fwd.com' : 
               return /ERROR/CLIENT/BUSY_HERE
               with {reason = "I do not want to call you"};
               default : 
  10           return forward;
             } 
           }
         }
       }
  15 }