waKKu

[default]
exten => s,1,Goto(ura,s,1)
exten => s,2,Hangup

[ura]
include => ramais

exten => s,1,Background(prosulvitoria)
exten => s,2,Wait(3)
exten => s,3,Background(prosulvitoria)
exten => s,4,Wait(3)
exten => s,5,Hangup

exten => i,1,Goto(ura,s,2)
exten => t,1,Goto(ura,s,2)
exten => T,1,Goto(ura,s,2)

exten => fax,1,Goto(fax-in,s,1)