WaitForSilence( )

Waits for a specified amount of silence

    WaitForSilence(wait[,repeat])

Waits for repeat instances of wait milliseconds of silence. If repeat is omitted, the application waits for a single instance of wait milliseconds of silence.

    ; wait for three instances of 300 ms of silence
    exten => 123,WaitForSilence(300,3)