[Asterisk-Users] Why 's' doesn't take over unknown extension in context ?

[Robert Rozman]

Hi,

I always thought that if there is no called extension in context, then 's' 
extension is started (I use latest bristuffed Asterisk) ....

I have context 'from-isdn' :
[from-isdn]
exten => s,1,Wait,2
exten => s,2,NoOp(ISDN call from outside ${CALLERID}: Name: ${CALLERIDNAME}, 
Number: ${CALLERIDNUM})
exten => s,3,SetCIDName(From ISDN: ${CALLERIDNUM})
exten => s,4,SetCIDNum(0${CALLERIDNUM})
exten => s,5,AGI,callerid_lookup.agi
exten => s,6,NoOp(After callerid_lookup.agi: ${CALLERID}: Name: 
${CALLERIDNAME}, Number: ${CALLERIDNUM})
exten => s,7,DBget(temp=DYNAMIC/${CALLERIDNUM})
exten => s,8,DBdel(DYNAMIC/${CALLERIDNUM})
exten => s,9,Background(custom/aa_1)
exten => s,10,Wait,5
exten => s,11,Dial(Local/${temp}@ext-local/n)

exten => s,108,Goto(from-pstn,s,1)   ;

exten => 999999,1,Goto(s,1)   ;


Now if there is no line 999999 on incoming call I get :
    -- Extension '999999' in context 'isdn-incoming' from '041461620' does 
not exist.  Rejecting call on channel 0/1, span 1

Why doesn't extension 's' get started if extension 999999 is unknown in 
context from-isdn?

Thanks in advance,

regards,

Rob.