Asterisk ivr

[main-entry]
exten => s,1,Answer
exten => s,n,Playback(sound)
exten => s,n,Set(numTries=0)
exten => s,n(naberite),Background(sound)
exten => s,n,WaitExten(3)
exten => 1,1,Goto(blacklist,s,1)
exten => 2,1,Dial(IAX2/asterisk/1000,,m)
exten => 3,1,Dial(IAX2/asterisk/1000,,m)
exten => 4,1,Dial(IAX2/asterisk/1000,,m)
exten => 0,1,Dial(IAX2/asterisk/1000,,m)
exten => i,1,Playback(/var/lib/asterisk/agi-bin/register/sound/pbx-invalid)
exten => i,n,Goto(s,naberite)
exten => t,1,Set(numTries=$[${numTries} + 1])
exten => t,n,GotoIf($[«${numTries}» < «3»]?s,naberite)
exten => t,n,Dial(IAX2/asterisk/1000,,m)