Mine

; ${ARG1}=StationA1; ${ARG2}=StationB1; ${ARG3}=StationC1; ${ARG4}=Ring Time; ${ARG5}=Roll To; ${ARG6}=Dial Optionsexten => s,1,NoOp(Ringing ${ARG1} then ${ARG2}  then ${ARG3} for ${ARG4} seconds then rolling to ${ARG5) - ${MACRO_EXTEN} from ${MACRO_CONTEXT} ${SIP_CODEC} ${CALLERIDNUM})exten => s,n,Macro(cnamfixup,${MACRO_EXTEN})exten => s,n,SetAMAFlags(BILLING)exten => s,n,execif($["${CALLERIDNAME}" = ""],agi,calleridname.agi)exten => s,n,Macro(CheckMaxCalls2,${ACCOUNTCODE})exten => s,n,Set(RINGME=${ARG1})exten => s,n(goDial),Dial(${RINGME},${ARG4},${ARG6})exten => s,n,GotoIf($["${RINGME}" = "${ARG3}"]?Roll3:Roll12)exten => s,n(Roll12),GotoIf($["${RINGME}" = "${ARG2}"]?Roll2:Roll1)exten => s,n(Roll1),Set(RINGME=${ARG2})exten => s,n,Goto(goDial)exten => s,n(Roll2),Set(RINGME=${ARG3})exten => s,n,Goto(goDial)exten => s,n(Roll3),Goto(${MACRO_CONTEXT},${ARG5},1)exten => s,n,Hangupexten => BUSY,1,Voicemail(b${ARG3})exten => BUSY,n,Hangupexten => CHANUNAVAIL,1,Voicemail(u${ARG3})exten => CHANUNAVAIL,n,Hangupexten => NOANSWER,1,Voicemail(u${ARG3})exten => NOANSWER,n,Hangupexten => CONGESTION,1,Voicemail(u${ARG3})exten => CONGESTION,n,Hangupexten => CANCEL,1,Hangup