Astdb is an internal database of Asterisk used to perform basic operations, so we are not forced to install a more complex and heavy database such as MySQL, PostgreSQL or any other. The Asterisk database is organized by families, in each family there are keys that are the final values.

• Write:

  exten => _X.,n,Set(DB(${PEER}/parking)=${PARKINGEXTEN}})
  

• Leer:

  exten => _X.,n,Set(PARKING=${DB(${PEER}/parking)})
  

• Borrar:

  exten => 457,1,DBdel(test/count) --> Borra la llave
  exten => 457,1,DBdeltree(test) --> Borra la familia
  

Un ejemplo podría ser el siguiente:

exten => *301,1,Answer()
exten => *301,n,GotoIf($["${DB(survey/activated)}" = "1"]?activated)
exten => *301,n,Set(DB(survey/activated)=1)
exten => *301,n,Playback(beep)
exten => *301,n,Hangup()
exten => *301,n(activated),Set(DB(survey/activated)=0)
exten => *301,n,Playback(beep)
exten => *301,n,Hangup()