; to change main greeting
exten => 51024,1,Wait(2)
exten => 51024,2,Record(/etc/asterisk-bec/greeting_rec.wav)
exten => 51024,3,Wait(1)
exten => 51024,4,Playback(/etc/asterisk-bec/greeting_rec.wav)
exten => 51024,5,Wait(2)
exten => 51024,6,Hangup()

exten => 51025,1,Wait(1)
exten => 51025,2,Playback(/etc/asterisk-bec/greeting3.wav)
exten => 51025,3,Wait(2)
exten => 51025,4,Hangup()