Thanks for that
[ext-meetme]
include => ext-meetme-custom
exten => 55512345,1,Set(MEETME_ROOMNUM=55512345)
exten => 55512345,n,GotoIf($[${DIALSTATUS} = ANSWER]?READPIN)
exten => 55512345,n,Answer
exten => 55512345,n,Wait(1)
exten => 55512345,n(READPIN),Read(PIN,enter-conf-pin-number,)
exten => 55512345,n,GotoIf($[foo${PIN} = foo12345888]?USER)
exten => 55512345,n,Playback(conf-invalidpin)
exten => 55512345,n,Goto(READPIN)
exten => 55512345,n(USER),Set(MEETME_OPTS=cM)
exten => 55512345,n,Goto(STARTMEETME,1)
exten => 6000,1,Set(MEETME_ROOMNUM=6000)
exten => 6000,n,GotoIf($[${DIALSTATUS} = ANSWER]?READPIN)
exten => 6000,n,Answer
exten => 6000,n,Wait(1)
exten => 6000,n(READPIN),Read(PIN,enter-conf-pin-number,)
exten => 6000,n,GotoIf($[foo${PIN} = foo1234]?USER)
exten => 6000,n,Playback(conf-invalidpin)
exten => 6000,n,Goto(READPIN)
exten => 6000,n(USER),Set(MEETME_OPTS=ciM)
exten => 6000,n,Goto(STARTMEETME,1)
exten => STARTMEETME,1,MeetMe(${MEETME_ROOMNUM},${MEETME_OPTS},${PIN})
exten => STARTMEETME,n,Hangup
exten => h,1,Hangup
; end of [ext-meetme]