Mine

[incoming]

;exten => s,1,Zapateller(answer|nocallerid)
;exten => s,n,PrivacyManager
;exten => s,n,Dial(${PHONEALL},30,t)
;exten => s,n,Hangup


exten => s,1,Answer
exten => s,2,Background(hawaii)
exten => s,3,Set(TIMEOUT(response)=5)
exten => s,4,Set(TIMEOUT(digit)=5)

exten => i,1,Goto(s,3)

exten => t,1,Dial(Zap/7,30,t)
exten => t,2,Hangup

exten => fax,1,Set(FAXFILE=/var/spool/asterisk/fax/${UNIQUEID}.tif)
exten => fax,n,rxfax(${FAXFILE})
exten => fax,n,Hangup