[POTS-Incoming]                         ; this define POTS incoming
 exten => s,1,Answer                    ; pot pick up the line
 exten => s,2,wait(1)                   ; wait for 1 sec
 exten => s,3,Background(thank-you-for-calling)
 exten => s,4,Background(if-u-know-ext-dial)
 exten => s,5,Background(otherwise-press)
 exten => s,6,Background(1)
 exten => s,7,Background(for-accounting)
 exten => s,8,Background(2)
 exten => s,9,Background(for-tech-support)
 exten => s,10,Background(3)
 exten => s,11,Background(for-louie-louie)
 exten => s,12,Background(4)
 exten => s,13,Background(for-wakeup-call)
; exten => s,14,ResponseTimeout(15)  ; wait for 5 seconds
 exten => s,14,wait(10)
; exten => 1,1,Goto(s,4)
; exten => 1,2,Hangup
; exten => t,1,Goto(s,4)
  exten => s,15,Background(goodbye)
  exten => s,16,Hangup
  exten => *,1,Goto(s,4)  ; user hit * 
 exten => i,1,Playback(pbx-invalid)   ; will loop back to start when user key in invalid ext
 exten => i,2,Goto(s,4)