call back dialplan

[from-corporate]
exten => _X.,1,GotoIf($["${CALLERID(num)}" = "7925000000"]?callback2,s,1) 
exten => _X.,n,Hangup
 
[callback2] 
exten => s,1,System(/etc/asterisk/scripts/callback2 ${CALLERID(num)} &)
exten => s,n,Progress() 
exten => s,n,Wait(1)
exten => s,n,Playback(transfer,noanswer)
exten => s,n,Hangup
 
[mera-callback-out2] 
include => out
exten => s,1,Answer()
exten => s,n,Set(Prohod=0)
exten => s,n,Wait(1)
;Read(variable[|filename][|maxdigits][|option][|attempts][|timeout])
exten => s,n(nach),Background(speed-enternumber)
exten => s,n,Read(EXT,,,,,5)
exten => s,n,Set(Prohod=${MATH(${Prohod}+1)})
exten => s,n,GotoIF($[${Prohod} > 3]?t,1) 

exten => s,n,GotoIf($[${LEN(${EXT})} >= 3]?${EXT},1:i,1)
exten => s,1,Dial(SIP/out/${EXTEN},60,HhtT)
exten => _s,n,Set(CALLBACKEXTEN=${EXTEN})
exten => s,n,NoOp(DIALSTATUS: ${DIALSTATUS})
exten => _s,n,Goto(s-${DIALSTATUS},1)
exten => s-BUSY,1,Goto(busy,1)
exten => s-NOANSWER,1,Goto(noanswer,1)
exten => _s-.,1,Goto(hz,1)
exten => busy,1,PlayBack(callback/busy)
exten => busy,n,Goto(mera-callback-menu,s,1)
exten => noanswer,1,PlayBack(callback/noanswer)
exten => noanswer,n,Goto(mera-callback-menu,s,1)
exten => hz,1,PlayBack(callback/chanuval)
exten => hz,n,Goto(mera-callback-menu,s,1)
exten => i,1,PlayBack(privacy-incorrect)
exten => i,n,Goto(mera-callback-out2,s,nach)
exten => t,1,PlayBack(callback/timeout)
exten => t,n,Hangup()
 
[mera-callback-menu] 
exten => s,1,Background(callback/menu)
exten => s,n,WaitExten
exten => 1,1,PlayBack(callback/repeat)
exten => 1,n,Goto(mera-callback-out2,${CALLBACKEXTEN},1)
exten => 2,1,Goto(mera-callback-out2,s,nach)
exten => i,1,PlayBack(callback/badnom)
exten => i,n,Goto(mera-callback-menu,s,1)
exten => t,1,PlayBack(callback/timeout)
exten => t,n,Hangup()
 
мой колбек файл
#!/bin/sh
sleep 5
 
NUMBER=$1
 
echo "Channel: SIP/multifon/$NUMBER
MaxRetries: 1
RetryTime: 30
WaitTime: 30
Context: mera-callback-out2
Extension: s
Priority: 1
AlwaysDelete: Yes
" > /var/spool/asterisk/tmp/$NUMBER.call
 
mv /var/spool/asterisk/tmp/$NUMBER.call /var/spool/asterisk/outgoing/