Mine

context agents {

        _15XX => {
                if( ${GROUP_COUNT(${EXTEN}@agents)}=0 ) {
                        Set(OUTBOUND_GROUP=${EXTEN}@agents);
                        Set(AGENT_NUMBER=${EXTEN});
                        Monitor(wav,${UNIQUEID},m);
                        Dial(SIP/${EXTEN}|30|TtWw);
                        switch (${DIALSTATUS}) {
                                case BUSY:
                                        AGI(agent_dnd.php);
                                        NoOp("${var}");
//                                      Hangup();
                                        break;
                                case NOANSWER:
                                        AGI(forcedlogoff_noanswer.php);
                                        goto queues-manip-system|O${AGENT_NUMBER}|1;
                                case CHANUNAVAIL:
                                        AGI(forcedlogoff.php);
                                        goto queues-manip-system|O${AGENT_NUMBER}|1;
                                default:
                                        NoOp("Ooops, nao devia ter chego aqui.(agents:default:case)");
                                        Hangup();
                                        Break; 
                        };
                } else {
//                      Busy();
                        Hangup();
                };
        };
};