[custom-meetme3]
exten => s,1,Answer
exten => s,n,read(CONFNUM,/var/lib/asterisk/sounds/conf-getconfno)
exten => s,n,GotoIf($[ ${CONFNUM} : “717[0-3]” ]?ext-meetme,${CONFNUM},1:)
exten => s,n,CBMysql(${CONFNUM},)
exten => s,n,goto(custom-meetme3,s,1)